I would suggest looking at the Sager NP6165 and DV6t Quad Edition (with the GT 650M and 1920x1080 display upgrades)
For the Sager NP6165, follow this link to the configuration page
. Select Windows 7 under Operating System. It will be $949 no tax.
For the HP DV6t Quad Edition, follow this link to a saved configuration
that includes the GT 650M GPU upgrade and the 1920x1080 display upgrade. Don't downgrade the display to 1366x768, because 15.6" 1366x768 displays make things onscreen large and tend to have very poor image quality due to low contrast. Don't downgrade to the GT 630M GPU because it is considerably less powerful than the GT 650M, and don't upgrade to the 2GB version of the GT 650M because there will tend not be an appreciable difference in game performance due solely to an additional gigabyte of memory on a GPU of this level. Apply coupon code NBW9325
to make it $949+tax.
These are on USA websites.