For the right price, he's a solid starter IMO. No, he's not a star, and shouldn't be paid like one (even though somebody probably will). However, he rebounds, he blocks shots, he can give you 15PPG, plays hard, young, healthy... that's a solid piece. 15 PPG, 5 RPG, 1 BPG, above average defense, 45% FG, 35% 3PT, 80% FT. In other words, a solid above average player.
As long as he's ultimately the 3rd or 4th banana on the team I think he's worth somewhere north of the MLE and less than $10M. I think the right environment could upgrade him to a plus defender (in addition to his shot blocking from the wing).
I'd actually really like to have him, but it's all about the price.