I just discovered "post-rock" music today. Very beautiful music if you are patient enough to listen to a 20 min instrumental. I discovered Godspeed You! Black Emporer and Explosions in the Sky today. I always thought Godspeed was an emo metalcore band or something by the name but they have some really amazing instrumentals.
If you can sit through it, check out "Moya." A lot of droning in the beginning, but it only helps the mood in the building up to the finale.