Nvidia's FX line is not a great product line. Check the
prices out on this page. Look at the prices for the TI line of cards. That product line is over a year old now. That's pretty old for video cards. They are still fetching a fairly high price compared to the FX cards. Why? Because they are faster than most of the FX line without the AA and ansio filters on.
Anandtech These tests shows the TI4200 outperforming the FX5200 Ultra in every test even with the filters turned on. The FX line was an incomplete product rushed to market and shows it.
ATI for me please!