Swapping out cards into your build just brings it even further under the mark. Since you seem to want to nitpick, TC could also just go with a 7970 as tried and true option while the only thing that separates the standard from the GHz edition is a mild overclock. Oh look, it comes with three games of your choosing out of a decent selection and still comes in at ~300. Anyone who fails to see that AMD has the best bang for the buck right now in the high end of the spectrum is either blind in their fanaticism or has more dollars than sense.
Antec High Current Gamer 750W PSU= $90 http://www.newegg.com/Product/Product.aspx?Item=N82E16817371049
CM Storm Trooper Case= $150 http://www.newegg.com/Product/Product.aspx?Item=N82E16811119245
Total: $1145 before rebates, $1095 after rebates
You could shave $50 off by choosing a $99 case and it is likely that the 7950s will drop a bit in price with the new line coming out, so you could hold off on Crossfiring for a month or two if needed. It just depends how much over a $1000 budget you can go.
CMStormtrooper / SLI GTX 680 / GIG z68 / email@example.com / 8GB RAM / 256GB+128GB Crucial M4s / AW Optx AW2310 120hz for FPS/ U2713HM 1440p IPS for all other games