I don't think it's possible to say Bute is up there with Calzaghe yet because he's simply fighting too many easy fights, and not being in the Super Six has made his opposition pretty shabby really.
As for Ward, that really would be interesting I reckon. It's hard to compare eras, and a shame that Calzaghe didn't have more competition that actually wanted to fight him, but he had some great performances, and I think he'd be in with a good shout against all of the current crop at smw.
Bookmarks