The only difference in the drivers is if you get the one without the soundbank, you will need to insert your original Driver CD, so it can copy the soundbank off of it during install. I personally always get the one with the soundbank, just incase they update the soundbanks.
As for which drivers on winxp, I would use the latest windows 2000 v. 2.02. DO NOT USE the windows 98/me drivers, they won't work, only windows 2000, or xp when they come out with them.
Regards,
Daniel