Sunn O))) rules, saw them live at the ATP in Catskills in August last year. Quite heavy and seriously great transcendent stuff. Their Monoliths album is also great. 
More transcendence:
Mountains - Air Museum 

Nice I will have to check out that Mountains. 
I saw My Bloody Valentine when they played in Chicago a couple years back. Incredible transcendent gut-rearranging stuff live. As is Sunn 0))) live (incredible stuff. A sonic experience). Another one I loved live was Pan Sonic, for similar visceral reasons. 
Now I have moved on to the Salem "King Night" album. Celebrating the winter solstice a day or so late. 
Not coincidentally, I am also demoing a potential subwoofer purchase (REL Storm III).