Wow. That's an interesting trade. Aldridge fits that team so well, and is a perfect fit next to Oden. However, Amare is, in my mind, the best offensive big man in the NBA. He can score in the post, and he can stretch the defense with a very good jump shot.
The question for me would be, does he hinder Oden's development? Would he and Oden have the same problems that he and Shaq have, as Oden becomes more of a part of the offense over time? Would Amare be upset that Roy got most of the shots down the stretch?
Ultimately, I'd probably pull the trigger if I were Portland. It's hard to get superstars in this league, and Amare is a young and dominant one.
As for Phoenix, if they decide that Amare has to go, Bosh would be my first target. If he's not moving, then Aldridge + salary relief + some other pieces isn't a bad return.