I have an older 1.8 P4 with 4X AGP, 512 ram, 400 FSB. My video card is going, it is a geforceMX400 64MB. I am looking at either of these cards, both about the same price. Are these "TOO GOOD" for my computer? In other words, am I paying for more than I will actually get out of it? Should I look at something like a radeon 9550, X1300 pro, GEforce 6200 OC or the 7800, all 256MB cards. Any advice is appreciated.