Country Joe and the Fish, Electric Music for the Mind and Body... You dont even need to be high, you'll feel it while listening. But if you do decide to roll a fatty get ready to hold on while spinning the vinyl.
http://www.well.com/~cjfish/electric.gif

Another classic for me would be:
Miles Davis, "Some Kind Of Blue"

For the best results, spinn classic vinyl... CD's... Bad!