"Which psychedelics are best for music appreciation?" would be a good question, as would
"Which psychedelics are the most social and recreational?" - but just asking which to take is not allowed.
I'll leave this open for now, since we don't have a "Which psychedelics are best for music appreciation?" thread as far as I'm aware, however please guys stick to discussing that - don't just list substances, give your preferred substances for listening to music, and explain why you like them, pros and cons, etc
Glad to see a moderator's view on the subject at hand, with that in mind, I'll go into more detail on my original suggestions.
The consensus among my friends and I, is that mushrooms are ideal in a natural setting with music highly targeted towards psychedelic responses or nature. Ambient music, down tempo, psychill, and whatever genre of music Shpongle type music would qualify as.
LSD seems to be a lot more... civilized, as far as good music/settings. I would never consider any time of "rock" music on shrooms. Psychedelic Rock though... on acid... was amazing. Acid doesn't also seem to feel as blissful in comparison to shrooms when you get the whole nature aspect into it. However psytrance which is amazing on on shrooms, is equally amazing on acid. At that point, you've only got to consider physical setting.
Also, shrooms seem to be far more appealing to me in low light settings. Acid seems far more appealing in daylight type settings. My personal policy has been: Night time or Nature = shrooms. Daylight or "festival" setting = acid.
I honestly feel like taking acid at night without much lights is a waste. Taking shrooms in daylight has never felt like a waste, but in low light settings it's always been absolutely magical, especially when the light is natural sourced (stars/moon/camp fires). Acid doesn't give me the same bliss from those light sources.
Another interesting aspect on the whole "natural vs civilized" aspects of the primary two, on mushrooms, I want to sit down under a tree, I'll get dirt all over me, and not care, see a tiny insect on the apple I'm eating and eat it with it. I feel a part of nature. On Acid, I'm the opposite. I want to maintain regular everyday hygiene.