This is a tough question. Probably Clayman, but I'd love to hear Whoracle and The Jester Race from start to finish too, though with IF being the way they are now, I don't see that happening.
I've got nothing either. Then again, I don't really go to concerts all that much to begin with. Usually just a once in a blue-moon sort of thing.
DAMN, that's a lot.
\m/ for PQ, Heathen, and Helloween BTW.