I also don't really think that Diaw is better than Diaw in the post. Even if they were the same there, Diaw has the ability to play either forward spot or a point forward position as well. That makes him far more flexible than Boozer and therefore it would be easier to find minutes for him as a 6th man.
I do hear what you are saying though. Diaw makes it not necessary for us to get a 4 but I sure would love the depth it would give us.
What about Wallace playing the 2 spot and having Boozer, Diaw and Wallace on the floor at the same time?
1) I would rather have Diaw in the lineup than Boozer, hands down. Diaw creates advantages lineup wise that we would lose with Boozer. Diaw is very fast for a PF, has a decent low post game, and is a threat at the end of games...and he is supposedly smarter than any coach on this team
2) Wallace can't play the two, because he isnt a shooter. It's been tried in the past, and has not worked.
3) I doubt Diaw would be happy as the 6th man on a team that's never made the playoffs if he wasn't happy as the 6th man on a championship contender...