Gymnopedie no 1 is one of the most beautiful peices of music ive heard. Nice call on that one Aimless
Boards of Canada, godspeed, sigur ros, mogwai... Lots of good music in this thread
Yall should check out Stars of The Lid, Fennesz and eluvium for some pure soundscapes
My Bloody Valentines Loveless is one of my favorite albums to fall asleep to. Flying saucer attack is along the same lines as are the Cocteau twins
Check out Clouddead for some ambient weirdo hiphop.