Deep Purple...the whole Made in Japan CD (esp. Child in Time, Smoke on the Water, and Space Truckin'...only the ones off that CD though, because the studio versions of all of them suck)
Rainbow - Stargazer
Most any Dio from Holy Diver or Last in Line, esp. Last in Line, Holy Diver, and Rainbow in the Dark (his best stuff is on those two albums...and the first two Rainbow CDs)
Metallica, of course...
Queensryche - Promised Land, I Am I, Damaged, Anybody Listenning, I Dream in Infrared, Take Hold of the Flame
And of course maybe some Collective Soul and Tool, as was already suggested.