you can listen to anything on lsd as long as your enjoying it who cares? and if it sounds tripped out then you should listen to it.. it might give a whole new perspective on the song... whenever i trip i always go for the spacey stuff but ive listen to stuff that wasnt very spacey or trippy at all but still totally got into it... it doesnt have to be psychedelic but it doesnt hurt either..
Psytrance works really well and I love me some infected mushroom, curiously enough I have never listened to them while tripping
I have never tripped on acid before, but in my experience with LSA I would suggest some Ravi Shankar music. Hey, what can I say, it's a classic.
Pink Floyd's Relics album, A Saucerful of Secrets and The Piper at the Gates of Dawn are all very incredibly intense to trip to, sometimes dark, but definitely a very worthwhile time... Hell, go sit in a dark room sometime with it playing too... or close your eyes...
I've always loved listening to jazz while tripping. My favourites for tripping have always been Bill Frisell, Dave Holland, Jack Dejohnette, and Viktor Krauss...but I've also enjoyed Miles Davis, John Coltrane, Charles Mingus, Herbie Hancock and lots of others. Find some jazz to listen to. As long as it's got long improvisations and a nice groove you'll dig it for sure.