what your dream concert? with a limit of four bands! mines Iron Maiden Gamma Ray Megadeth Sonata Arctica (2005 line up)
Well this is in the metal forum so I assume it's limited to metal bands... Let's see. Psyopus (Puzzling Encounters era) Agents of Abhorrence Pig Destroyer Nasum
If it could be I'd have both Rainbow and Deep Purple with Blackmore. Fill the day up with Iron Maiden and Black Sabbath with Ozzy and it sounds like the ultimate dream concert to me
Blue Cheer and The MC5 to kick things off (with all dead band members resurrected), then Black Sabbath with Dio on vocals BUT still performing their earliest material, then end it with Immortal Technique, Atma, and Diabolic doing a mixed set. [EDIT] I think Asmodean and I are the only ones with any imagination. PS: I also think Ian Anderson (with or without Jethro Tull) would have to be thrown in there somewhere.
Black Sabbath with the original line up. Sleep Venom (original line up) Iced Earth circa Burnt Offerings.