I am looking at bying a new card. The card I have right now is a geforce 4 ti 4600 but I'm looking at the Redeon ones this time round. Do people find them better than the geforce counter parts? I was looking at the 9600xt and the 9800xt. I can get the 9600xt at just over £100 and the 9800xt the £350ish. What is the main difference between the two?