The KSG SCX is the hottest car out right now. They can be hard to find and expensive to buy even used, Parts are not nearly as readily available either, not to detour you, the car is a rocket.
For an average guy on a budget I would recommend the Hyperdrive Pro4. As it sits it is a very competitive chassis another advantage is the Pro5 will be out soon and I'm certain there will be a conversion available for guys that have a pro4 as they use the same front end and rear pod.
If it smells burnt up.. it's more than likely hot.. you don't have to touch it..