It would be wrong of me to suggest a car without knowing your background and the tracks you intend to race at, so +1 with above, get yourself to a local meeting and see what chassis is popular.
having a popular chassis will enable you to share set ups with others, and hopefully source parts quicker =)
Also, take into account your budget and stick to it as best as you can.
hope that helps =)
Fusion Hobbies / www.horshamrc.org
The wife stops me being sane and the r/c stops me from going insane....