Now you'll need to check out Sigur Rós (Ágætis byrjun and the Ba Ba Ti Ki Di Do EP, for example), The Album Leaf (In a Safe Place), Do Make Say Think (and you might as well check out some other Canadian post-rock while you're at it: GY!BE, Fly Pan Am, A Silver Mt. Zion, One Speed Bike, etc.), Four Tet, Mogwai, Explosions in the Sky, Plaid, Board of Canada...
Nah, to be fair, 2008's 'Með suð í eyrum við spilum endalaust' was a great album, but then they veered hard back into the ambient stuff, which doesn't really interest me. But their work on 'Odin's Magic Raven' that came out a couple of years back, and the new record, 'Atta' is back to what I love.