I got into radio controlled cars in the early nineties. I ended up collecting 4 of them. Two identical pairs for me and the little woman. We had on road and off, trucks and cars. Both sets electric 1/10 scale. Two Losi LXT model stadium trucks and two Associated RC10 model cars. The trucks would run anywhere and were a lot easier to set up and drive than the cars, thus they saw a lot more use and got all the upgrades.
The RC10s are your typical out of the box RC10s. Neither have any upgrades. Both run Novak receivers and Novak 4-10 Speed Controller. They were the most fun on the parking lot for Albertson's and Kmart. You could get the cars screaming around the parking lot. There is just not enough road viewable in a residential neighborhood to have a good race. That is of course unless you want to be slowing down the entire time turning within the curbs. A parking lot is a must for these.
The two trucks on the other hand are both upgraded. The full race one has everything titanium instead of steel and bearings everywhere. They both have the Hydro-Drive, a viscous coupler that makes the truck such an awesome competitor. They both have extended front graphite braces and the main truck has a S309 servo, which is so strong it can pick up a bowling ball. Both have Tekin radios and 4-11P speed controllers. With heavy mods and an 11 cell pack, the race one was clocked at 53mph on radar. It was setup just for a high speed run and could have never turned fast, let alone race. The run was just to see what type of a top speed we could get while the radar station was out front.
I learned more about cars and how to set them up from building these models than I ever did in shop class. I also learned a lot about rechargeable batteries which has came in handy a few times. I highly recommend getting a RC kit that you have to build yourself, the fully assembled kits just cannot compare.
A very fun aspect that you will also learn a lot about is painting the bodies. As the bodies are lexan, you must mask and paint on the inside of the mold. This gives a very cool shiny look to almost any paint job and can be the most fun part of a radio controlled hobby.