I'd be down for Noah on a cheap contract, maybe in Amir's place if he was really healthy.
Howard is a no, because I wouldn't give him the kind of money he can get without knowing if he could really make a large positive impact on this team, and since Houston wanted to much for him in a trade we couldn't know that without giving a possibly foolish high cost commitment.
I'd love Horford on a 2/45M$ or 3/65M$ kind of deals. His game fits this team well and his game should age gracefully, but I wouldn't want to give him a full 4 year max.
Pau is just too old for me. Unless something happens that makes this team a championship contender over the summer, I probably wouldn't be interested.
I want NO part of Whiteside. Just too many headaches for a guy who isn't very good on offense, can't pass AT ALL (a necessary skill for most of our bigs) and is a severely over-rated defender. The block totals are amazing, but he's a poor positional and team defender, while also being a guy who wastes blocks by not keeping them in play. Not worth near what he'll get on the open market.
Big Al is a no for me, too old, too slow and too isolation dependent.
ZaZa is an interesting one. He's like 30 now right? He'd fit right into Amir's role. He's good at all the small things like setting screens and offensive rebounds.
And while I think Durant is unlikely, I wouldn't say it's impossible. If he does leave OKC, I'd say we have almost as good a chance as anyone else. This team is a KD away from being a top-flight contender in the East and would immediately have a great chance at reaching the finals for the next 3-4 years, plus we'd still have a huge pool of assets to use (including all the BRK picks) to continue to improve the team. With our rising young team, well liked All-Star PG and one of the leagues brightest young coaches and best FO groups, on top of the assets and additional cap space, I think it would be silly to count us out of that just yet, especially if we manage to make an ECF run.