The mini cars are fun but getting any real speed out of them is tough because they get out of control real easy, all it takes is a tiny pebble on the road and it will get out of control. I have an rc18t with a 9000kv brushless in it that would probably do 75 or 80 but at 40mph it gets loose and I have to back off the throttle. The rc18t is 4wd and even it has a hard time getting traction, if I go full throttle from a dead stop it will just start spinning all 4 wheels and doing donuts then the tires go flying off the rims.
If you really want to have a good time with rc try to find an indoor carpet track near you, I bet they will have a beginner class on race night that you can run the tamtech in. We race carpet off road at my local track and its awesome, I couldn't imagine what id do on friday nights if I couldn't race. Most guys at any track are very helpful to new guys and will be able to give you a hand, not to say you wont find a couple guys that take it way to serious and act like assholes.