Well it all depends on what you want to run on and what your budget is. The Savage X SS is a kit and requires servos, a radio, and starting equipment. It is a great truck but it will cost a lot. My reccomended setup for the savage X ss is this:

Kit ( http://www2.towerhobbies.com/cgi-bin...&I=LXMYA2&P=ML )

3 channel radio ( http://www2.towerhobbies.com/cgi-bin...?&I=LXLZP2&P=7 ) The 3PM is a very nice radio and the synthesized
version is even better since you do not need crystals to change channels. I'm thinking of buying it myself. If you have more money for a radio I highly reccomend you check out the nomadio sensor. Unlimited Engineering ( http://www.unlimitedengineering.com/...e/NOM-104.html ) sells it for $360 with an additional receiver included for free. The sensor also operates on a 2.4ghz frequency which means no interference from other cars or other objects and no interference from a servo or ESC or motor on an electric car. Both of these radios do not include servos. If you get the speedmart catalog there is a coupon for something like $10 off the 3PM I believe.

Steering servos:

For servos I reccomend you get something like this for steering: http://www2.towerhobbies.com/cgi-bin...?&I=LXDWF8&P=7
If you have a little more money something like this would also be a good idea: http://www2.towerhobbies.com/cgi-bin...&I=LXUZ80&P=ML
If you have a lot of money than this is probably one of the best servos on the market: http://www2.towerhobbies.com/cgi-bin...?&I=LXHZS1&P=7
The last servo has high torque and is also pretty fast so it is the absolute best for steering

Throttle servos:

a cheap servo: http://www2.towerhobbies.com/cgi-bin...&I=LXVW07&P=ML
This servo is strictly budget, it won't bite down very hard on the brakes and isn't particularly responsive, it's cheap though

mid range servo: http://www2.towerhobbies.com/cgi-bin...?&I=LXDTB3&P=7
a little more performance over the first servo for a little more price

high end servo: http://www2.towerhobbies.com/cgi-bin...?&I=LXDWF8&P=7
This servo is a little overkill on throttle and brake duty, but it will bite the brakes hard and is so so responsive.

Running equipment:

For running equipment you'll need a few things. First a glow starter, second spare glow plugs, third fuel, fourth a battery and charger for the rotostart, and fifth a fuel bottle

Glow starter: This isn't a very important choice but there are several models avialable so pick one that's good for you. A standard rechargable one like this is the most popular and is good for all around use: http://www2.towerhobbies.com/cgi-bin...?&I=LXSF52&P=7
Some come with a battery meter on top like this one: http://www2.towerhobbies.com/cgi-bin...?&I=LXJ802&P=7
Most glow starters come with chargers. Other glow starters can use alkaline batteries:
http://www2.towerhobbies.com/cgi-bin...?&I=LXUM80&P=7
or
http://www2.towerhobbies.com/cgi-bin...?&I=LXKLM2&P=7
just pick one you like

Spare glow plugs: All nitro kits include or should include a glow plug. Still it's always a good idea to keep a couple spare plugs since sometimes a plug can burn out after just the first run! You don't want a cold plug as they are only really good for running in high heat conditions and they will mess with the engine timing. A hot plug is a good idea if you will be running in the winter. Here is a hot plug that I reccomend:

http://www2.towerhobbies.com/cgi-bin...?&I=LXABK7&P=7

For general purpose though a medium plug is the best idea. Something like this will do fine: http://www2.towerhobbies.com/cgi-bin...?&I=LXAAX2&P=7


Fuel: fuel choice is very important for the life of your engine. 10% nitro is really not a good choice as it can damage your engine and will give you very low power. 30% is mostly for racing and it costs a little extra. It gives you the highest power. Most people will buy 20% fuel as it is a nice balance of performance and price. Here's what I'd suggest for 20% fuel:

http://www2.towerhobbies.com/cgi-bin...?&I=LXTT04&P=7
http://www2.towerhobbies.com/cgi-bin...?&I=LXMGE5&P=7
http://www2.towerhobbies.com/cgi-bin...?&I=LXJM38&P=7
http://www2.towerhobbies.com/cgi-bin...?&I=LXNE12&P=7

For the rotostart you don't need any fancy batteries or a charger. A simple wall charger like this one will do: http://www2.towerhobbies.com/cgi-bin...?&I=LXL342&P=7
For a battery a simple stick pack will do. Something like this is cheap and has a lower capacity: http://www2.towerhobbies.com/cgi-bin...&I=LXHUJ8&P=ML
Something like this has a higher capacity: http://www2.towerhobbies.com/cgi-bin...?&I=LXHUJ9&P=7

A fuel bottle is an easy choice, just pick the cheapest. 250ml is plenty big so here's the cheapest on tower: http://www2.towerhobbies.com/cgi-bin...?&I=LXBDU5&P=7

Another thing you'll need for running equipment is a glow plug wrench to remove the glow plug from the engine, it's also good for taking off the wheel nuts. Here's a standard one that's pretty cheap: http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXL387

Hop ups for the savage: What I am about to list I won't really consider hop ups as they are pretty much necesary to run your car properly. The first is a fail safe. It will apply brakes or just let off the throttle if you battery runs out or your radio signal is lost. Here's a standard failsafe: http://www2.towerhobbies.com/cgi-bin...?&I=LXHUH6&P=7
another choice is this one: http://www2.towerhobbies.com/cgi-bin...&I=LXHLV3&P=ML

The next item is a temperature guage. This tool is vital to the engine life and to the first time tuner. It will help you see if you are in the ball park range for proper tuning. There are 2 styles that are popular. Onboard and laser. Onboard is usually cheaper and is mounted on the truck. I prefer onboard temp guages as they record the temp the whole time they are on not just when you pull over the truck and check the temp. The other style is a little handheld unit which you point at the engine head and it tells you the temperature on a little LCD display. Here are a few examples of onboard guages: http://www2.towerhobbies.com/cgi-bin...&I=LXHUH2&P=ML
http://www2.towerhobbies.com/cgi-bin...?&I=LXGZK7&P=7
http://www2.towerhobbies.com/cgi-bin...?&I=LXHEM4&P=7

Some examples of a laser temp guage:
http://www2.towerhobbies.com/cgi-bin...&I=LXEMG5&P=ML
http://www2.towerhobbies.com/cgi-bin...&I=LXKAX3&P=ML
http://www2.towerhobbies.com/cgi-bin...?&I=LXPEX7&P=7

One thing I highly, highly suggest that will also save you some money is a combination temp guage and failsafe. There is only one on the market that I know of but if your engine gets hotter than a preset temp then the failsafe will kick in. This is a very good thing to have as an extra layer of engine protection. Here's the combination display: http://www2.towerhobbies.com/cgi-bin...?&I=LXJTW3&P=7

The last item I highly suggest you buy is a rechargable receiver pack. The stock 4 AA box will work but the batteries will die soon and replacing them often can cost a lot! Here's what I use on my savage: http://www2.towerhobbies.com/cgi-bin...&I=LXFJT1&P=ML
Here's a higher capacity pack: http://www2.towerhobbies.com/cgi-bin...?&I=LXMEY1&P=7
Here's a really cheap, but okay quality pack: http://www2.towerhobbies.com/cgi-bin...?&I=LXLFX1&P=7

Then there are other hop ups like shock towers, exhaust pipe, wheels and tires, etc. But those are more of a personal taste so I will leave those up to you. What I can suggest are the engine stop from HPI, the 3 speed tranny from HPI, and the lexan radio cover. I suggest before you go out and buy aluminum hop ups, drive the car and after you break a part replace it. It's the best way to know where a weak spot is and then strengthen it.

That pretty much concludes my long post on the savage X ss. I'll write about the T4 and the TXT-1 in another post.