I have a Gigabyte X800XT, and my friend has an eVGA 6800 Ultra that he wants to trade me plus 75.00 cash. I had a 6800GT and noticed a world of difference going from that to the X800. I like the 6800 Ultra's support for HDR and other little bonuses, but the pure Power of the Ultra plus the cash is definately tempting. What would you do?