I wouldn't bother then, for the difference it will probably make it will still leave you disapointed. I've lost count of the cards I have bought over the years, I used to get the latest and greatest everytime, but you get to a point and realise that there really is no point, especially with the speed at which the video card market and technology moves.
Save the pennies and get a 360 as a priority, as the basic package is crap and you'll probably want it with all the decent quality cables, wireless pads, HDD and toys...