Post Rock/Instrumental (recommended album):
Godspeed You! Black Emperor (Lift Yr Skinny Fists)
A Silver Mount Zion (Horses In The Sky)
Explosions In The Sky (The Earth Is Not A Cold Dead Place)
Sigur Ros ("()") - lol
Múm (Finally We Are No One)
Kaada (Music For Moviebikers)
E.S. Posthumus (Unearthed)
Deserts of Traun (The Lilac Moon)
Clint Mansell (The Fountain OST)
Kaada & Patton (Romances)
Prog/Other:
The Mars Volta (Deloused)
Radiohead (OK Computer)
Porcupine Tree (In Absentia)
King Crimson (ITCotCK, Discipline)
Sufjan Stevens (Illinois)
Mr. Bungle (California)
A lot of this is relatively unknown, especially the post/instrumental bands, but they're all excellent and unique. I'll upload some of the cds for you.