if you're not going to be racing, novaks get kind of expensive for just messing around. if you're just hitting the tracks with friends and there's no restrictions on what you can run, as in you don't have to be "legal", i would check out the mamba max systems. on a 2s lipo or even 6 cell nimh with a 4600 or 5700 motor, i think you'd be really happy with it.

what's the system going in anyways?