I recommend by far the 60's 70's phycedelic/rock music. Guys, this music came from the greatest guitarists of all time who put their weed-loving minds into making the chillest and most mind-bending music of all time. Ready to trip? try:

purple haze, jimi hendrix
sunshine of your love, cream
can't you hear me knocking, the rolling stones <-----oh ya
magic carpet ride, steppenwolf
revolution, the beatles
slow ride, foghat
come together, the beatles
american woman, the guess who
hope your feelin better, santana <-----will feel like ur in that 70's show

and last but not least...

blinded by the light, by manfred mann's earth band, i cannot stress this one enough!

LET THE GOOD TIMES ROLL GUYS