get those card which support HDR, just upgraded my rig to E6300 (clocked to 2.8MHZ 7 x 400MHz) and using X1800GTO (was using 9800PRO). Man I tell you, the HDR effect is freaking AWESOME, e.g. if u got a big sword when u ride through the sunshine your sword will grow immensely without any enchant, and become dim when under shade. Also color and enviroment in STV is so lively when in the evening, words just can't explain it.
HDR FTW!!