well if you move your budget to about £80 - £90 get a NVIDIA GeForce 8600, they awesome got one in my computer really love it.
fastest cards in your price range http://www.dabs.com/productview.aspx?Quick...NavigationKey=0 http://www.dabs.com/productview.aspx?Quick...NavigationKey=0 not exactly insane or anything but still around 2-3 times as powerful as the x1500 both beg for overclocking FYI.