guys with Waiters' skill set are a dime a dozen in the NBA. If SU continues to play at a high level and stays in the top 5 all the way into March, he will benefit from that glow and somebody will take him in the late 1st or in the 2nd round
After beating up on Depaul and Seton Hall, Melo's stock is high right now. If the draft were held this week, Melo would go between 10 and 20. He's 7 feet, is a good shot blocker, and can finish around the rim. But, he doesn't rebound well for his size and he is still not a good offensive player - he can stick the occasional mid range jumper, but most of his points come from put backs. He drops a lot of passes that should be easy buckets. If he wants to maintain or improve his position, he will have to keep playing defense at this high level and also improve his rebounding and offensive deficiencies.
actually, I think Waiters is exactly the kind of guy that Popovich usually takes in the late 1st or 2nd round - Pop would maximize his talents for a couple of years off the bench (plus Pop and JB are friends, so he would have all the background info as well)