I recognize he's from your Alma Mater, but Derrick Byars is currently ranked #39 on draft express. I'm pretty sure McGuire is flat out better than Byars, and he fits the Spurs better too, being able to play small-ball PF, as well as SF & SG. He's a better rebounder, and is a potential shut-down defender, with length, lateral quickness, and he LIKES playing D. He's unselfish and a good passer. Finally, there's the dreade P-Word. He's only 21, and his frame appears capable of adding significant strength. This will translate into much better ability to score when absorbing contact in the painted area when slashing.