My GF FX 5200 Ultra (crappy card, I know, but I'm a very casual gamer...), on an AXP 2800+ Barton, plays UT2k4 fine at 1024x768, so I think any GF4 will play UT2k4 well, especially since my card is roughly equal to the Ti 4200.
Heh...I remember the TNT2. My last machine (Athlon 800) had one...