He is obviously a great fighter. Personally I think he should stay at 160 and take on anyone willing to fight him there. It'd be a huge mistake for him to go up to super middle, he's really not a big guy and very few with an agressive style of fighting moved up successfully(Duran being the exception). Personally I think he beats someone like Canelo or Cotto, but loses to someone like Ward. So that being said.
How far does he go in boxing?
Where is his career headed?
Who at Middleweight can actually challenge him?
My opinion is he can be a superstar if he avoids moving up, but giving the lack of options at the moment, he may not have a choice.