GTX580 is the stuff.
I'm currently running a GTX580 with a GTS450 in my Phenom2 965/MSI NVIDIA 980A rig with a Dell 3007 WFP HC 25X16 monitor.
This is DEFINITELY the ultimate single GPU / single screen setup. My son and I just finished playing Metro2033 all the way through at 25 X 16, AAA, 16X AF, PhysX on, in DX11, silky smooth gameplay.
Now, my other computer has GTX480SLi, so I'm not easily impressed. I'm impressed.I'd also note GTS450s make kick ass PhysX cards.
What you won't notice with these cards noise. I played a few levels of AVP without my speakers on and never noticed the fan spin up.
If anyone has a benchmark requests, I'll run them as able. Not many review sites use AMD cpus, so I might be able to give you a better idea of what to expect with yours.
intel 990X + 2 X EVGA 3GB GTX580 + 3 X Acer GD235Hz
3D Vision Surround
intel 2500K + NVIDIA GTX590 + Dell 3007 WFPHC
[SIZE="1"]NVIDIA Focus Group Member
[B]NVIDIA Focus Group Members receive free software and/or hardware from NVIDIA from time to time to facilitate the evaluation of NVIDIA products. However, the opinions expressed are solely those of the Members.[/B][/SIZE]