Well, I tried using the UX2 as my primary sound card yesterday and was successful with everything except CD burning... I get a terrible stutter now when I burn CDs, regardless of which program I use (Nero or Acid Music Studio). I have no idea what the issue is, since I disabled the Audigy card in the system, disabled Norton Antivirus (after taking the computer offline), had all the drivers set to ASIO with 24-bit depths, on all my software programs.
Like I say, my software was happy, everything sounded and played great, but I can no longer burn a CD that isn't flawed. I made perfect wav files and MP3s... it's confuisng.
Anyway, I may have to revert to the Audigy or just replace it with an M-Audio 2496... but if anyone else has had a similar experience to this running Windows XP 2, let me know.