I am looking to buy a new computer soon. For my new soundcard, I am trying to compare the Audigy 2Zs, M-Audio Revolution 7.1, and the Echo Gina or Mia. I currently have a Sound Blaster Live Value card. 
I am using Vegas for editing, and mostly I use the sound from the recorded video. I want to also add in some occasional music tracks, as well as voice overs. 
Separate from editing, I like to listen to music CDs while surfing the net and doing other non-video editing work on my desktop. I also indulge in an occasional game. 
Given my uses as described above, what do folk recommend for a soundcard?