I've banged the "let's help OKC to get Gortat or Asik by taking on Perk's horrible deal" drum for weeks.
It makes more sense to me to look for a deal that has the Celtics being the team to acquire Gortat or Asik rather than taking on Perk's salary so that OKC can get better.
Well, last year absolutely, next year maybe, but not this year, IMO. Both Gortat or Asik make sense as Perk upgrades to try to win now, Asik being the first option. But at their current money or more, I wouldn't want them on the Cs. They were hot garbage in Eurobasket, really.
Why take on Perk's horrid contract? The Dallas pick could be out of reach until 2018 (top 20 protected until 2018, then unprotected), so it's not only about the pick. You send Bass and Crawesome to Houston, they get to play some, and you free not only a roster spot, but also ease the logjam at the 4 and 2.
If you combine this trade with the Boozer trade, you get to unload at best Hump and Lee (if Chicago doesn't want Lee's extra years, you send Bogans)and get a quality starter at the 4 (plus an even better first rounder which could be out of reach until 2016 - unprotected). Perk and Boozer are amnesty candidates, but give you a very capable frontline until the young players develop.
You need an structured roster, and vets to lead. The downside is taking on that money (actually if you make the Boozer trade you trim 1.2M to 1.5M in salaries, allowing to fill the roster spots with undrafted rookies). But at the 2015 trade deadline you'd have 15+9=24M in expirings to make room or trade or do whatever you like. Trading for a soon-to-be 2015 class FA could be easier when you have expirings/picks/assets.
The last good thing about getting Perk back is Danny having to stomach his terrible contract, the one Celtics could not give him (and wouldn't had given him even if possible). I don't like the idea of overpaying Perk, but I'd like him in green for reasonable money (3M/year), and Rondo, FlCeltsFan and many others would like him back.
If these trades went down, you could send Bogans to a team under the salary floor, like Philly, for a future second rounder, or a cheaper player, to get some cap room.
Rondo/Pressey
Bradley/Brooks/Bogans
Green/Wallace
Boozer/Olynyk
Perk/Sully/Fav