Re: i$e's Magical Music Megapost
I'd say their 3 best songs are Coda, The End of the Beginning, and From Dust to the Beyond, all are off The End of the Beginning album. I'd round out the top 5 with No Return and Snowfall, which are both of their self titled album. All is Violent, All is Bright has a couple of stand out tracks though - Fragile and Suicide by Star.
I have 3 Explosions in the Sky albums on my iTunes, they don't captivate me nearly as much as GIAA. Sigur Ros is BOSS, haven't heard anything else in your post-rock section though.