As already mentioned on this thread, get the car thats popular at the club your going to race at.
That way im sure people will beable to help you out in terms of spares and setups.
There will also be a reason why that car is most popular, probably because it does well on the track.
Most Popular Cars in my opinion
(in no particular order);
Losi, Xray, Mugen, Associated
I run a Losi 8ight EU. It suits my driving style and I handles just how I like it.