Quote Originally Posted by UserName AlphaNiner
Tool, duh.

Fugazi (Straight Edge band....but OH MY GOD is that shit f-u-c-k-e-d up)

Aphex Twin

NiN

Strangely enough, Against Me! is great to listen to while tripping.

DJ Tiesto

Beastie Boys have some pretty trippy tracks, actually.
nicely said