There's a thing: as much as I like Posey, if you're looking for a player to offer the full MLE for 5 years to, Maggette is the better option.
Why? Maggette is 28, Posey is 31. Moreover, as much as I like Posey, he's strictly a complementary player. He might be one of the best complementary players in the league, but 3 years from now, Maggette can be asked to carry more load, and Posey can't.
Moreover, if we can get Maggette's head to be in the right place, we can use an athletic, experienced wing off the bench for 25-30 minutes a game. It's a tough decision to make, but that's what Ainge gets paid for. I remain extremely curious about what's going to happen.