My headphones, the AKG K702 (non Annie), arrived yesterday. I was blown away by the sound, having never heard anything like it. I want to upgrade my computer hardware to keep up with it. Currently, I have a Sound Blaster X-Fi Titanium Fatal1ty Professional with no external amp. What will cause a bigger increase in sound quality: upgrading to a new sound card, such as the ZxR, Claro Halo, or Xonar ST; or simply getting a dedicated headphone amp?
I am eventually going to upgrade both, but which is more urgent?