i was gonna keep my mouth shut about usa6x6, but can concur with rob, there are issues with them, and i wouldnt buy wheels from them. If you want custom wheels, get ahold of john at Stazworks.
http://www.stazworks.com/
Ouverson sells the best rockwell parts made. i will be running his brakes, and 2" 41 spline shafts before long as well i'm sure.