ok first of all no offense, but dr. octagon is the worst "musician" ive EVER heard in my life...and i love rap. please dont listen to him when you're shrooming!!!!!!
now to the question:
I'd definitely agree with Phish, some more mellow Dave, and definitely Trance. Last weekend I was shrooming and was introduced to a band called the Stringcheese Incident - since then I've downloaded a shitload of their songs. Look up "Pirates" by Stringcheese incident. its great for shrooming. I'd also say that stuff like robert miles is great, especially when coming down. Enya - Caribbean Blue and Sail Away are great songs.
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"Fuck World War Two, I am an Elephant!"
-Albert Hofmann, 1943.