I'm running a system with Windows 2000 Pro and the Voodoo 5500. I wont go the XP route because I just don't think its the great OS is cracked up to be....at least not yet.
Anyways, I'm using the standard drivers (from 3DFX) and when I did a Windows Update a few months back, noted Microsoft had a new driver for the 3DFX card. Seems to work fine.
My system is a AMD Athlon XP 2000+ (1.666ghz) w/256mb ram (PC133) and a SCSI RAID hard drive(s). In Aces, I am seeing 79FPS with FSAA off, 39~65 FPS with FSAA x2. It works quite nicely. However, games that use the Quake engine are problematic at best.
If you've been following the other threads, my new system uses a GeForce 4 4600. Problem is the GigaByte motherboard is defective, so I'm on the old system until I get the new MSI motherboard (two gaming systems, isn't life good?
). You might want to consider a GeForce 4 4200 or 4400 and dump the 3DFX card altogether. I'm finding more and more games will not work with it. Even the 3D Game Studio software hates it.
Summary: Dump the 3DFX card in favor of a GeForce 4, and go Windows 2000 Professional. I bought a copy of Win2k at GoogleGear.Com for $138 last week.