Savage X 4.6 RTR in a heartbeat, a great monster truck that will last forever and ever, great parts availability everywhere, great hop up options from literally hundreds of companies...I'd recommend it to anyone as a first nitro car, to make sure they get something easy to start tune and run, plus durable and easy to find parts for. It'll do about 45mph at full speed, but can easily be driven in a more relaxed manner.

http://www.hpiracing.com/products/en/867.html

EDIT: Forgot to say, I have one myself. I spend most of my time racing touring cars and buggies, but when I do feel like going to the park and grabbing big air, I'm very happy I have the Savvy, it's a real riot.