For some reason I didn't like the new Symphony X as much as I thought I would, even after 2 or 3 listens... But it's been a while since I've listened to it and I've been meaning to give it another listen just to make sure I'm not missing anything.
Anyway, this was a great list. Though I'm not as big into prog/power as you are and Iconoclast was pretty much the only album on here I've heard, I can tell this was a fun time putting it together as it was seeing what was next. I'll probably get around to checking some of these bands out in the future.
5/16: Rotten Sound
5/23-5/26: Maryland Deathfest
5/28: Cannibal Corpse
6/1: Bolt Thrower