I don't know which of the current crop of big guys in college I'd take, but I like Len and Zeller. I'd still take Noel if he comes out unless he's got the crazy bad genetics that Greg Oden had.
Singleton has been coming along likely and I wouldn't mind him as a backup to Webster. Not sure how much longer Ariza is signed but however long it is, I don't think he's worth bringing back.
Maybe they get a high lottery pick and trade it for another veteran - hopefully a younger guy like maybe LaMarcus Aldridge.