"music for sleeping" (I kid you not!)
AIR AIR AIR AIR AIR!!!
I sleep to Air quite a bit. I keep the volume very, very low.
If you are looking for some trance to exercise to, I'd recommend Astral Projection and Hallucinogen, both are goa for the most part (straight forward trancey trance), although that can get a bit boring after a while. Doof is decent too, check out "Let's Turn On". Ceiba, if you can find it, is quite alright....