Can't say for sure what it sounds to me on acid if you're actually into it, because I used to be huge metalhead until the first time I tried shrooms. They then altered my taste in music for good. Prior to that point I tried acid just once and I didn't listen to metal on that particular trip.
Afterwards however there was one instance where my friend played some technical death metal (obscura) while I was peaking on 400ug and it was fucking beautiful in a strange way. This happened right after I got out of a shower (taking a shower on a high dose of acid is something special too).
I will never forget that particular day and how epic it actually was. I expected it to sound scary, messed up but no.
If you play just about anything that is complex and takes a lot of skill, I'm sure you'll find a way to appreciate it on acid.
Otherwise nowadays I seem to prefer to listen to 70s rock on acid. Psychedelic rock or trance can sometimes be a bit overwhelming, but stuff like zeppelin takes the cake for some reason. It might be for the fact that it was LSD inspired, or for the fact that they really knew how to make good music or even both.
If you're a metalhead I suggest the progressive stuff more especially Obscura, Beyond Creation, Gojira, Death - the Human album and everything pass that, stuff like that.
If you're a bit more open minded check out the early works of Yes, Jethro Tull, early Genesis, Grateful Dead and as mentioned already Led Zeppelin.