I completely agree with everyone above. When I was buildling the computer you see in my sig, I was deciding between those two cards. Then I saw this Tom's Hardware benchmark guide:
and that's when I decided on the GeForce Ti 4200 64 MB-8X. I got it for around 50 bucks on ebay, shipping included, and that's cheaper than you can find the FX 5200 and ATi 9200. As you can see in the benchmarks also, it beats them both pretty badly, usually 20-30 FPS more depending on the game. I definitely recommend the GeForce Ti series.