This may be a bit heavy for you, but I'd defintiely recommend you check out The Angelic Process, particularly their newest album. Imagine Sigur Ros put through a hundred distortion pedals and you're kind of close to The Angelic Process. Also, Caspian (No, I didn't name myself after them) are a pretty solid post rock band that trade 10 minute long songs for extra catchiness and general good times.
Finally, if you want to be a bit adventerous, give Nadja a shot. Something like MBV or Sigur ROs slowed way down with lots of extra fuzz.
I uploaded some Angelic Process and Nadja in the sendspace thread. Go an have a look, and download 'This Will Destroy You''s album "Young MOuntain", as it's also a really nice post rock album.