Thats my take from looking at the feature list of the two versions. So if you plan on 'purchasing' XP, get the Pro version. I think you should really look into buying Xp period. I think that if you investigate XP further you will see that your best bet is going to be 2000. In response to Kaj17 Well, I wouldn't spend 800-900 on a MB either.
Stability is a key benefit as well as the speed gain.
If one process crashes in Win2K, an increased likelihood that only that process crashes exists on a dual CPU configuration. Linux rarely crashes on me, so I just enjoy the speed with it. It can only run dual Celeron's and any Celeron higher than 533 isn't SMP capable. The VP-6 is a great board. Honestly, look at the reviews of it.