Sounds about the same age that Michael Owen won the Ballon D'Or.
Roma were really the perfect big team for him with their off-the-cuff style, but I don't think there was enough big club mentality about Cassano. Perhaps he has matured, but just because he is on form doesn't make him a changed man. One bad turn and he may be crying like a baby again. For that reason I wouldn't want him at Juventus. Before you consider that I am a Giovinco fanboy or Cassano hater, I chose him and Aguero as my favourite non-Juve players in that thread.
I also don't think Cassano is the difference between Juve winning the CL and not. Cassano has had what, one successful international tournament (Euro 2004)? So what makes him a banker to do the business against the very best sides? The teams who have been doing well in the CL of late are either the pragmatic Man Utd and Chelsea or Barcelona who play an unmatched passing style, Cassano fits into neither category. Juventus already have a risk factor to their play, the players and Ferrara have acknowledged this and it is why we give up so many chances and are giving Buffon so much to do, also why Moggi considers Juventus will not win the CL. I hope he is wrong of course, but see where he is coming from.