I have just upgraded from 2x 8800 gtx cards in sli to a gtx 580 as one stopped working and I can honestly say, hand on heart, i preferred my 2 8800s!
I'm running a dell 24" @ 1920 res and play BFBC2 on full graphics. The rendering was far superior on my 8800s and wish i had bought another for £50 instead of splashing out £400 for the 580.
A 580 is miles ahead of 2 8800gtx cards. How you havent noticed the difference is beyond me. Do you play with your eyes shut?
