Thanks very much for your response! I appreciate it. - You're welcome, glad I could be of help.

For drifting I could possibly switch out the motors, and then for carpet racing, I could put the 12t motor back in. - Most certainly.

I also thought I read somewhere that a car had the capabilities of limiting itself to a certain speed (like a governor). - High end radio systems feature throttle limit %, I have not seen a switch/capacitor/resistor or any other means of doing this.

On another quick note, my father owns a mortuary and we have 2 parking lots. - The Pro4 is an extremely low chassis, any debris could prove bad on the lovely carbon fiber.

What about the HPI Sprint 911 Turbo? RTR, out of the box 32 mph, and painted body... would it be a better choice than the pro4? - Better choice for drifting? Yes. Better choice for a carpet racer? No. Also, speed is truly limited to your motor and ESC to a point. I myself am not one of those guys who wants to have a super fast 'VSM says TEH 99MPH OMFG it IS!!111!one!' guys. I enjoy a well handling car that provides a high FUN factor, that is after all the reason for the hobby, no? So it boils down to what you really are going to be doing with the car and how serious you want to get.