Mancini billet sets are good we have used them. My son gets cloyes sets from summit A-tech through his comercial account. He gets good prices through quantity orders of parts. They are all drop shipped Cloyes billet true roller race sets.
If they are anodized and look pretty they are usually not that good. Also look at the pin if they have a center punch in the center of the pin throw it right in the metal bin for trash. You cannot pin punch a hardened pin to assemble the chain.