Has any one tried any of the no name brand or uncommon name brand stage 2 cluches that are sold on ebay? I was thinking about the stage 2 "Boss" brand clutch.  Would I be wasting money? I need to support about 425rwhp close to 500hp at the crank guesstimated. Or should I just save up for the Spec stage 2 cluch.

I'd recommend going with a genuine Spec Stage 2 clutch. Besides the quality probably being better, with Spec you have better supprt if you have installation problems, and also better warranty support.