I'll second that, I have a yokomo gt 4 i think, and it is extremely fast. The only problems are (A) they like a very smooth big parking lot, and
(b) Go through the tires like crazy.
Now I had a older hpi r4 sedan, that before i put the hotter motor and 2 spd in was very good on rougher surfaces, and was easy on tires,
but once you add that speed and power your going to burn through the tires even with a excellent handling car.
if you got the extra cash then go for it by all means!!
Have Fun