there will be a a few cars to choose from with many fans for all of them. i think if your just starting out and want to get a feel for it, go with the true and tested stuff like tamiya ta05, cyclone s, kyosho tf5, or you can go the other route and invest more now so you don't have to buy upgrades later. the higher end cars are the tc5, xray, cyclone tc, trf415-416, which costs more but worth it if you are looking to race long term.
i run the xray 009 but went through the normal progression with rtr cars like the cyclone s and kyosho tf5, to learn the ropes, understand how it all works, before making the leap to the 009.
good luck with it