Wouldn't waste my time on Perk. I'd rather start Olynyk or Humphries at Center than bring Perk back at this point...he's too limited.
The Amare move I'd do in a hearbeat though. Perfect move for us IMHO because...
1. If he gets healthy and can play at even 85% of his former self, we get the elite scorer we desperately need. Rondo, Green and Amare gives us a fantastic neucleous to build around. Also Amare would fit this team well right now because the rest of our starters (Rondo, Bradley, Green, Sully) are pretty passive offensively so there would never be any question over who is the #1 scoring option. It allows Green to step into a secondary scorer role (where I think he really excels).
2. If he gets injured and never plays another game, then we will totally suck and probably becoe a terrible lottery team. Next year we get a very good pick (plus probably a very solid second one to go with). 2014-2015 season we will still suck, but it gives us a chance to evaluate those new rookies and see what they can do, as well as seeing who on this current roster is worth keeping or not. 2015-2016 season Stoudemire's $24M comes off the books and we have a ton talent that we can use in trades.
Any new rookies we acquire combined with our current players, combined with whoever we sign with the fresh $24m gives us a chance to put a contending roster together.
I think it's a win-win for a team in rebuild mode like us.
On the other hand if we keep Wallace, then by the time 2015-2016 comes along we still owe $10M to Wallace and won't have enough to sign anyone more thenn a good role player (as opposed to an All-Star).