Prog metal:
Masterplan
Obligatory Amazon link; no samples, but I can't find anything better.
Metal:
Black Label Society - "Stronger Than Death"
This latest album is better than their older stuff.
Made me look up what a
pinch harmonic was. (Hey dave, learn this!)
Prog rock:
Porcupine Tree - "In Absentia"
Again, latest is better than older.
Just plain rockin' rock:
UFO