Non-FIRST Motor Suggestions?

[ctt956]

I am looking for motors to drive a radio controlled robot I plan to build. This is not FIRST related, and therefore doesn't need to be FIRST legal. The drivetrain setup would be like that of a zero-turn lawn mower, with the two rear wheels independently driven and casters in front. Just to be safe, they would need to be capable of moving 200-250 lbs.(with both of them combined). As for the electrical system, I'm not really stuck to one voltage. I thought 24 volts would be best, but I can't seem to find suitable motors for this, at least not reasonably priced. I could probably get by with 12 volts. I'll probably use AndyMark's Cheap and Dirty Radio Control System(I am aware that the radio receiver needs a different power supply; this isn't an issue). I read that Fisher Price Power Wheels motors are capable of moving 200+ lbs, would those work? If so, would Victors/Talons work for controlling them? I know they were in the FRC KOP for a while. Any other suggestions that have controllers easily available, and preferably aren't too expensive?

Thanks in advance!