Everybody is of course entitled to their opinion and to run what they want.

BUT, I do feel something has to be emphasized - and that is, nitro is NOT hard. A few people who gave up half-way through break-in on their Traxxas RTR 3.3 and feel only some guy at the LHS can tune it for them are really not reliable sources of info on nitro. It's not that much maintenance either.

A Savage X 4.6 is a great first RC to start with. Or, more my preference, though more expensive, would be a Losi XXL. Or maybe even a buggy or truggy depending on the kinds of places you intend to run. Yes you'll have to research a bit about how to break it in(ask here, I'll tell you.. *No wait, see below..), maybe get a temp gun, and all in all do those kinds of things associated with a HOBBY, as opposed to toys. But again, 1.) it's a hobby, 2.) it's rewarding and a hell of a lot of fun when you get the engine screaming on even a half-way decent tune.., and 3.) doing it is simply not that hard. Nor is there much maintenance. Do a decent break-in(4-8 tanks with an SH engine), learn to judge the sound and smoke, which you control by adjusting two little needles, and off you go.. That's all there is to it.

* Breaking in an SH-based or RTR engine.

1.) Unscrew glow-plug. Look down in hole, rotate flywheel to point where piston is at absolute bottom position. Then, notch a little mark in your flywheel at 12:00 or so (9:00 on a Savage is easier.. In any case it doesn't matter.. It's only so you can know where that point is..)
2.) Ideally, wrap cooling head in alu foil. Heat with hair dryer up to 200F.
3.) Start engine. Put truck on ground, and with very small squeezes on trigger, drive around very slowly.. If engine sounds like it's choking on fuel(factory settings are often too rich..), lean HSN slightly - in 1/8 clockwise turns or so. Monitor temps. After 2-3 minutes, you want the temp to be 225F or so, give or take 10-15F. When it reaches this point, shut off engine. Rotate flywheel to 12:00 so piston is at bottom point for cool down.
4.) Let engine cool down completely. Read magazine, play with smartphone, whatever...
5.) Repeat ten or so times, gradually increasing the time on each heat cycle, and maybe gradually increasing throttle input(don't go too much over half-throttle for the first 8 tanks or so. Break-in should be more or less finished after 5-8 tanks. For the first half gallon of fuel alltogether, go easy-ish on the full-throttle - ie avoid it.. After that though, just letter' rip..
6.) The main thing about tuning nitro is just to be sure that it sounds right, and you can see a good smoke trail. A temp gun is a good secondary tool..., but really more important for break-in than everyday running. Once you learn the ropes, sound and smoke are enough, though you might still want to check periodically just for the hell of it..

This process is called "heat cycling". It's not rocket science. You just want the engine to get up to 225F, and let it cool completely, and repeat this process several times, so the internals of the engine will get seated properly. And yeah, I tend to try to go easy for the first half gallon.. But honestly, I'm onto my 20th engine or so by this stage, and my break-in phases have been getting shorter and shorter... (i.e. I'm ripping it up on the third tank sometimes... )