I think either of the RJ (remember it cost a first round pick for SA to get the better contract of Captain Jack for him) and Biedrins contracts are too toxic to fetch a player like Iggy with just Wright and the #7 pick tacked on.
Remember, our #7 pick in 2006 matched with Raef's comparably toxic contract brought us back another version of Raef (Ratliff) with one less year on his deal, and Sebastian Telfair, a 13th pick from a few years prior who hadn't impressed in his early seasons.
Very hard to see the addition of Dorrell Wright boosting the return of expiring + Telfair to 28-year old All-Star swing man.
No, I think Golden St. will have to set their sights lower. They might have a slight chance at Rudy Gay, if Memphis really wants to shed the long-term commitment.
I think they would be better off drafting a player, developing them, and then trying to revisit deals next offseason when Jefferson and Biedrins are expiring.