Artist: Ancestors Track: "Orcus Avarice" Album: Neptune with Fire Listen

At times blurring the boundary between new metal and nu-metal -- eek! -- this Los Angeles quartet peddles the kind of psychedelic, jam-based grind that fans of Black Sabbath love and fans of now-defunct Wolfmother could grow to love. Credit the band for pushing through a two-song concept record on its first try. The above clip has been edited for anyone who can't sit through a 17-minute opus.