<< I've had them both and both are good cards. If you have a mobo that is KT-133a, use the TB. If you have a 266a get the Audigy. I am using WinXP on an Epox 8kha+ with an Audigy. The audio is excellent to say the least, I'm very happy with it. Go OEM, best bang for the buck!
GPJ >>
i agree with Mucker here. I have used the Audigy on a VIA board with XP and drivers were fine, but I kept getting the pops and crackles so bought a Santa Cruz instead, which works great.
Sound quality wise I would say the Audigy, but others will disagree. The Audigy also has many more ports.