I have not yet. I shall give it a listen.Yes. A thousand times yes.Swans' The Seer is crazy. I haven't made it all the way through this two hour post-rock leviathan. It will sedate you and chill you like a morphine snow-cone. To Be Kind, their most recent work, is even creepier.
Have you heard Soundtracks for the Blind yet? This track is especially amazing.