Best Single Slot?

[Synomenon]

What's currently the best single slot, air cooled, NVIDIA video card? I'm looking to downgrade from a GTX 260-216 to whatever the highest end, single slot card is.

 

[Narynan]

On a quick go, I would have to say....
http://www.newegg.com/Product/...x?Item=N82E16814130377

 

[yh125d]

HD4850 is the best card you can get in single slot (at least according to newegg's options) but 9800/8800GT is the best nvidia offering, which is a bit behind the 4850