Just thought i would chime in here about victors. The 883s are rated for 24 volts and i used them in that orientation for my battle bot this past summer.s As for motors if you are going to spend some money anyway i would seriously consider electric scooter motors. There is a great website
http://electricscooterparts.com/ that has motors, batteries, and other control electronics if you are trying to move away from the IFI system.