KG has to guard Bosh whenever they're both in there. He's the only guy on our roster who matches up with him at all.
Yeah, fully agree. Garnett goes wherever Bosh goes.
Boston doesn't change it's big man configuration for Chris Andersen. Andersen is too limited an offensive threat. It makes no difference to Boston whether it's Joel Anthony, Chris Andersen or Udonis Haslem. Jared Sullinger (or Brandon Bass) can cover each one of them effectively.
The only reason to change Boston's big man combination is if Miami can bring an offensive threat on the floor who forces them to change up. Chris Andersen is a garbage man. Not a shot-creator. No need to change up. Sully (or Bass) can handle him comfortably. Heck, Paul Pierce can defend Chris Andersen or Joel Anthony effectively since those guys are so weak offensively.
Miami don't have any big man with size who can force that issue (to force Boston to change big man alignment) but they do have big quick forwards who can cause problems. So when Miami goes small with Shane Battier or Rashard Lewis at PF, it may be another matter.
Bass doesn't defend either player effectively and cannot take advantage of either player on the other end of the court. I don't think Sully can defend Battier or Rashard effectively either and we have yet to see whether he can punish either one in the post (although I like Sully's chances there, I would expect Sully to be able to do if Doc gives him the post touches). So it would be either be Sully and play power basketball through the post or go small with Jeff Green and matchup against Battier.