Ok, with the way some of you monkeys define progressive.... Seriously, Progressive =/= something completely whacked out and avant-garde.
You could call Dark Angel a progressive band, since some of the riffs they created were obviously never played before by another band, making the music progressive for the time. Progressive is in no way a completely tangible genre title...
EDIT: Now, Power Metal, I can't stand the modern definition of. Ususally used to describe endless double bass, non-stop one string picking, wanky 'neo-classical' solos, and high vocals with absolutely no strength whatsoever; I can easily state that the modern vision of power metal sucks some serious ass. Bands such as this are Rhapsody, Stratovarius, and a million other bands from both Finland and Italy.
Now, there is REAL Power Metal, such as Crimson Glory, Jag Panzer and early Fates Warning, and this Power Metal showcases creative lead work, heavy, thick riffwork, and for the most part, excellent vocalists who can evoke heaps of power in both high and lower registers. It's good eatin'.