A guy I would strongly consider is Bill Walker... Most drafts project him into the 2nd round. I think he has the physical potential to be another Ron Artest, but with less crazy and more jumpshot...
http://www.draftexpress.com/profile/Bill-Walker-552/
He's tremendous athlete with huge strength for his size.
He's developing a jump shot (which Artest never really had):
And he's already got a strong slashing game, which is something we lack from our reserves (ie. beyond Manu and Tony)
Finally, the best sign of all, he's willing to put the effort in on D
There are negatives, he needs to work on his handle
and his perimeter shooting.
I think the single biggest issue is his knees - he's had 2 ACL tears so far. I would want a thorough medical exam, but he looks like the real deal so far to me.
BTW, some people might say his at ude is a problem; I think SJax worked just fine. His intensity might be a real pick-up some games...