He would have a better chance at Middleweight than at Super Middle against Kessler and Calzaghe, I'm not denying he's good but he will struggle against those two guys. Would he beat Hopkins at 167 or Jones jr? I don't think so.
At Middleweight he gives Taylor a very good fight. Could he beat Winky? No!
Hw would have to do something dramatic in the ring to change my mind.