Asik on the other hand is a big who is arguably a very good post defender (jury's out on that) and a great rebounder with zero offensive ability. Plenty such players out there - Okafor is just one example of a guy with the same skill set (but better offensive game) who can likely be had for much less. Tyson Chandler - far superior to Asik, and with the Knicks looking to rebuild he may well be available. Kevin Garnett? Same skillset, less money, and I'm sure after this season's stats Brooklyn would consider dealing him for Hump's expiring. Even at his age, still better than Asik. Finding bigs with no offensive game who cam only defend and rebound? They are everywhere.
Saying that the jury is still out on Asik being a very good post defender is silly.
The thing with Asik is that he is a better defender and rebounder than the other guys out there who you would describe as "bigs with no offensive game who can only defend and rebound". There are maybe 1-2 centers out there who are clearly better on defense Asik. There are some who might be better, but might be about the same, or a bit worse. There are no big men in the NBA who are clearly better rebounders than Asik.
Add him to the likely Celtics roster for next season and you have a team that could be top ten in defense (and not just barely in the top ten), top ten in rebounding, and bottom ten in offense. What record does a team like that finish with? If the Celtics only give up one pick for Asik, does that leave them with enough assets to find an upgrade on offense that puts the team close to contention?
Yeah, I'm in agreement with crimson_stallion that trading our best offensive weapon in order to get Asik isn't necessarily a net overall positive move (depending, of course, on other possible transactions).
But the idea that the jury is still out on Asik as a post defender is, indeed, silly. Asik is easily, imho, one of the top 5 defensive centers in the league and a top 10 rebounder as well.
Our own assistant defensive coach, Ron Adams, has described Asik as the best defensive player he has coached.
I would be very excited if we were able to acquire Asik and I agree with LooseCannon that that would be transformative for our defense, but you have to be careful when you plug one roster hole not to create another one. As crimson points out, in reality there are only a handful of SFs out there in the league with obviously better overall value than Green.
In the end, sure, we may need to move Green in order to strengthen the overall roster. But any such deal should have a plan for replacing his production in the offense AND his perimeter defensive skills.
I don't think the proposed deals of Green for Asik make sense for us OR Houston. I think it makes more sense for Houston to get cap relief if their goal is to go after Carmelo. We have the ability to give them cap relief if that ends up being the case.