If these are gonna be trail ridden quads, I would go with the razrs if you don't want to spend a lot of money. If you want the best handling and grip combo, then use razr 2's for the front and holeshot gncc's for the rear. This is the only combo I run on my r...excellent handling and they grip like crazy in all kinds of terrain.
01 Banshee-.020" over, milled head, TDR reeds, lightened flywheel, +4 timing, Pro Design intake setup, Pro Circuit pipes, shorty silencers, 250r front shocks, Maxxis Ballance Razr tires, Fasst Flexx bars, 400ex thumb throttle, yfz450 brakes & ss brake lines.
86 trx250r-MSXC/GNCC bike...C-Leigh Racing ported engine...Yea it screams!