PawButtox :
What I was wondering would be what would be the best choice of sound card to get 7.1 surround out of these or would that not even be possible?
Headphones (generally) have 2 drivers/cones (one on each side), so they're inherently stereo, so any input will get "squashed" down into stereo. Not that it matters - any headphones with a decent soundstage will give a good stereo/surround "image" (tried with my Sennheiser IE7's and Grado SR-80e's, via the Realtek ALC1150 on my motherboard, which is surprisingly good - definite left/right and front/back direction).
P.S. "7.1" just means the sound is split into 7 channels for "tweeter" speakers, and 1 channel for a "sub-woofer" speaker.