Rush? Sigur Ros gives me such a huge rush. It's some of the most intense music I've heard. Another thing I love about them is how they conduct themselves from a technical standpoint. Their albums are recorded with 100% real instruments, and they record in a indoor swimming pool using a combination of concrete walls, vertical rugs, mic placement, and rack reverb to get that ginormous sound. Plus they record to tape, which in itself is awesome.
Agaetis Byrjun and ( ) are really good; they have some real gems. However I feel that Takk... is their most polished album as a whole; the entire thing flows like one big story.
My boss gave me like 100 unreleased live Sigur Ros bootlegs, and they are amazing. I even found Phil Belanger's song from Red Tape in there. Go figure.