Minnemann is an amazing drummer. But where all drummers are working on independence of the limbs, he's even working on independence on his thumb from his pinky, and left toe from his upper lip. He's just a bit "to much" when listening to him and his CD's. It's very inspirational listening to it drumwise, but I can't imagine him in dreamtheater toning it down so it suits the band.
Mangini so far is my first pick. But I think Wildoer is a guy that can be one of those suprises, far more suited than a Roddy. Roddy should stay with tech death metal, he's no progressive rock guy. Virgil and Lang are great clinicians but no drummers for a steady band.
Priester, guy is simply amazing, listening to him, and watching his DVD's, this guy would probably fit the best.. so I'm curious to his audition.