u2, robin trower, neil diamond, pink floyd defenitely, lots of others, also check out other genres, be open minded when it comes to music, i can never really trip to rock n roll, soul, RAP, triphop, jazz are some good stuff to trip on. dead prez, marvin gaye, portishead, radiohead, outkast, miles davis, mingus, weather report, sage francis, ray charles, tricky, etc