S!
I run the 5870HD at the moment, as a guy reallyreally wanted to buy the GTX480 from my rig
Only game with only MINOR performance issues is IL-2, but that is known. Rise Of Flight runs maxed out like nothing, so does Mass Effect 2 or any other game I play
And add to that the 5870HD is in another league when talking noise and heat compared to the NV card. Nevertheless, nothing bad to say of NEITHER brand.