The GF2 Ultra arrived - it's an eVGA, and it seems to work perfectly. I got Windows 98SE installed this evening, and it had no trouble throughout, and scored 79xx in 3DMark2000. I went with the 30.82 drivers suggested here, which were a very small download/install, and seem to be working fine. The Voodoo2 in the system scores much lower (I want to say around 1500 but honestly I've forgotten in the last hour 😵), but works correctly too.
As far as IQ (because I know this has come up with GeForce 2 cards in the past) - this GF2 Ultra is the first NV1x I've ever seen exhibit the "wavy lines" thing (I've owned 3-4 of them in the past that've never done it), but I've noticed it isn't consistent - it did it on and off (rebooting would either clear it or cause it) during Windows setup and while running on the MS VGA drivers at 640x480, but once the nVidia drivers were loaded and it setup at 800x600 (and later 1024x768) with higher refresh rates I haven't noticed it return. I wouldn't be too annoyed if it did either - it's fairly subtle (at least on this card I guess), and if I didn't have a solid blue or teal background during setup it'd probably have gone unnoticed entirely. I also have probably the worst possible setup for overall VGA quality, which may be influencing things; I have the GF2 looped into a DVD decoder via VGA, and that's looped into the Voodoo2, before connecting to the monitor. 🤣 Overall it looks good enough for day to day usage imho, and great for gaming. I probably wouldn't want to do anything "high precision" with this setup, but watching a movie or playing Unreal - no problem at all!
Thanks all for the input, and once I get the final little tidbits setup this should make a fantastic gaming box. 😀
Oh, and another note: I was afraid the GF2 Ultra would be loud because of the cooler design (mine looks a lot like other cards you see in pictures with the square green fan and little sinks on the RAM), but it's actually a pretty quiet card. You will notice it vs a passive card, but it's quieter than say, FX 5700 Ultra.