I find it very unlikely anybody has heard of or will like the weird stuff I listen to, but I'd recommend:
Ghost Keys - ISIS (or anything else off their newest album, Wavering Radiant. Really good stuff, as is their older stuff as well.)
Dim - Cult of Luna (or, again, anything by Cult of Luna)
The Hazards of Love - The Decembers (The whole album, not just one song, you have to have the whole experience in this case!)
Checksum - From Monument of Masses (or anything from their newest album)
This Land - Mammiffer (or anything from them, it's really odd experimental classical/post metal fusion stuff, I can't even describe it it's that weird)
I could go on, but I won't!