I totally agree with you. I have an Athlon 2000+ with a Geforce 3 Ti500, and Unreal II is herky-jerky in 1024x768, and just doesn't look as good in 800x600. It really isn't what I would call "smooth" in 800x600 32 either. It's real smooth in 640X480, and looks like junk. Also, I think I am missing out on some visuals with my graphics card. The models look, wierd...like mottled metal...all except the chick who works in the space ship--she looks fine. (Very fine. hehe. )
Anyway, after seeing BF1942 run like a dog in terms of memory and level-loading, and seeing Unreal 2 totally tax my system, I've come to the conclusion it's time to upgrade. Besides, my computer has DDR266, so I'm practically in the stone-ages anyway.
I'm thinking my next system will have...P4 3.2 GHZ or AMD 3200+, DDR400, Raid0, and Radeon with R350. (Depends on how long I wait...maybe FX-Ultra will be out by them, or even R400.)
I'm sure that system will be sweet--for about a year. Then Quake 4 will be out and I'll have to upgrade again.
I want to move to space, so I can overclock processors cooled to absolute zero.