First, let me echo something camss69 said, once again.
He's dead right. Buy quality.
You'll learn, over time as you build a few big ones, where you can find items that you're comfortable with that might save you a few bucks. Just as an example:
Airwild Hobbies offers some EXTREMELY high quality extensions, made from silicone coated heavy gauge wire, that are less than half the cost of some of their counterparts. You wouldn't think extensions would be a big deal, but in a 50 or 100cc plane, you can spend close of $100 on em if you're not careful! You can do even better with AirWild's equipment for making your own extensions.
So yeah...there ARE some places you can save a few bucks...but you've got to evaluate things carefully, and use high quality stuff.
ORIGINAL: f5air
I never saw any Wildhare Airplane but wow!!! but $469 for the Edge 88'' windspan!!! sound what a deal, compared to the almost $700 usd of the aeroworks.( i have AW 46.60 Edge and i love it).
I have to admit, I'm glad you're interested in the WildHare stuff. Again, I certainly can't and won't say anything bad about any of the other well known brands. In fact, by second hand experience, i can certainly suggest considering Performance Aircraft or SD Models...both make exceptional airplanes.
Admittedly, however...I AM partial to WildHare. As Jim said, you can't beat the price, quality, and service from Tom. That sort of thing means a whole lot to me, and I will do everything I can to reward him for doing business the right way by encouraging as many folks as I can to consider his stuff.
On the sevos...def. I will save money to get the best and protect my investment, i saw the hitec 7955TG for $87 each which is very good price so i think i will go with them. Or maybe HD Power??? i saw a lot of reviews on the web...and most of the poeple said good things about it...also the price is half than HITEC.
All I can say here is I can recommend the 7955TG's. Yes, they're probably more than you need for a 50cc airframe, but if you've got the budget, you won't be sorry you bought them. If they ARE "overkill", that's fine...you're simply not asking them to work very hard, which will extend their lives greatly....AND you'll have them around when and if you step up to an even larger bird.
Again on the HD Power...can't help ya there. Certainly haven't heard anything negative about them yet, but I just don't know well enough to make informed comment.
Talking about the RX, whats the best regulator to use lipo packs? im very familiar with lipos cause my helis 500ESP and 450 use them, but you just plug it with the ESC and thats it, lets fly. To be more specific. You use a regulator that you plug the lipo and then into the rx?.(i feel so ignorant asking all this but i prefer to ask to buy something that is not). And what about the A123´s you just plug in to the rx?. Whats the main difference?. whats the Volt on the A123 battery pack?.
Jim covered the A123 side of that, i'll address the LiPo side.
"Best" regulator is, of course, highly subjective. I've had very good luck with both Fromeco regulators and Radio South regulators. The key thing when looking is make sure they'll be able to handle the amperage needed for your bigger servos. Both of those I mentioned will do 10A or better, so they're easily going to be fine for anything in the 50cc range.
There are certainly others, and many I'm sure that will work equally well..I just don't know about them first hand.
As for the connections, when using a regulated lipo system, it's usually : LiPo -> Switch -> Regulator -> Rx
And don't worry about feeling ignorant. ignorance simply means you don't know something yet. Why would you? you've never done this!

You've identified the things you don't know, you're asking questions, and doing your research. That's PRECISELY the way an intelligent man goes about resolving his ignorance on an issue.
I never have time to think about the high quality heavy duty extensions and switches..what brand is the popular?.
As I mentioned above...I happen to like AirWild's Twisted HD extensions :
http://www.airwildpilotshop.com/More...product&id=213 or making my own using their twisted HD cable
http://www.airwildpilotshop.com/More...product&id=568
But there are several brands out there, many work quite well. Indeed, Tom at WildHare offers several package deals on servos that include the extensions!
OMG i just read all my questions and it seems that you guys will almost build my airplane lol, thanks a lot for all your time and patience on this but for me is important te recognize that in not my area........ask me about performance parts for any truck or car and i will be a master not the noob.
Once again...don't sweat it. You ARE a noob to this...we all were!

As I said, you are, imo, going about it exactly the right way. You're doing your homework!
Besides...if i ever need to hop up a truck, I'll no where to turn when I'M the noob!!