IMHO the C6 is the "best" motor I have used so far...
All the insanely fast guys around here run Nova P5's and JP B5 (both are around $250+ a pop) and a FEW run V-specs... But surprisingly a couple of guys have OS VG's (modded) and get great power AND great runtime in the 10-11 minute range.... Depends on the weather and pipe selection (as well as tune), they know the VG wont last long but for the money $140 they can buy 2 for almost the price of a P5 or a JP motor...
So... The choices are a plenty... Good luck!