TO Decipleofthewatch:
All I can say is you are out of your mind.....AC/DC one of the worst bands ever???? They pretty much define electrified, balls to the walls rock n roll (first half of their career at least). Early 70's PEntagram is awesome, but I'd agree that their 80's shit is lame as hell. First 3 Blue Oyster Cult albums are great, don't confuse them with Don't fear the reaper bullshit, totally different.
Blue Cheer??? Worst???? C'mone dude, they were cranking out distored metal riffs years before Black SAbbath, and were undoubtably the heaviest thing in their time.
Deep Purple, the early stuff, up to about MAchine Head, is truly classic killer metal. Once COverdale joined they got gay....CHeck out In Rock or Machine Head....awesome.
Witchfinder General may be an aquired taste for some. I personnally think they are great. Reagardless they were ahead of their time (though they would be more 80's than 70's).
RUSH?? Absolutely one of the most talented bands out there. SOme don't like Geddy LEe's vocals, but musically, wow.