Ok, this is what we have so far guys. I didn't include the vid card or psu since that's still up in the air. But at least we know how much money is left to work with for the psu and vid card. The OP has $269 left over for a psu and vid card. So I'm banking on either the Corsair or PC Power & Cooling 750w psu's and I have to say the gts 250 1 gig for the vid card if the OP is aiming for his budget. But two of those cards running in SLI would beat out two ATI 4870's Crossfired in a few of those games.
http://techgage.com/article/evga_geforce_gts_250_superclocked/ <=== test results for the gts 250 1 gig
http://techreport.com/articles.x/16504 <=== more test results
http://www.legitreviews.com/article/913/1/ <=== more test results
http://www.ninjalane.com/reviews/video/palit_gts250 <=== more test results
http://www.firingsquad.com/hardware/msi_geforce_gts_250_N250GTS-2D1G_review/ <=== and one more just for fun.
i7 build
http://www.newegg.com/Product/Product.aspx...N82E16811119137 $79.99
COOLER MASTER RC-690-KKN1-GP Black SECC/ ABS ATX Mid Tower Computer Case - Retail
http://www.newegg.com/Product/Product.aspx...N82E16813128386 $209.99
GIGABYTE GA-EX58-UD3R-SLI LGA 1366 Intel X58 ATX Intel Motherboard - Retail
http://www.ewiz.com/shopcart.php?additem=i7CPU $325.97
Combo: Intel Core i7 Processor i7-920 2.66GHz 8MB LGA1366 CPU, OEM
Cooler Master RR-UV8-XBU1-GP V8 CPU Fan For Intel LGA775 & AMD Socket 940/AM2
ARCTIC COOLING MX-2 Thermal Compound
http://www.newegg.com/Product/Product.aspx...N82E16820227381 $109.99 ($89.99 after $20.00 Mail-In Rebate) Free Shipping*
OCZ Platinum 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Triple Channel Kit Desktop Memory - Retail
http://www.newegg.com/Product/Product.aspx...N82E16822136319 $79.99 Free Shipping*
Western Digital Caviar Black WD6401AALS 640GB 7200 RPM 32MB Cache SATA 3.0Gb/s Hard Drive - OEM
http://www.newegg.com/Product/Product.aspx...N82E16827136152 $24.99 Free Shipping*
LG Black 22X (CAV) DVD+R 8X DVD+RW 16X DVD+R DL 22X (CAV) DVD-R 6X DVD-RW 12X DVD-RAM 16X DVD-ROM 48X CD-R 32X CD-RW 48X CD-ROM 2MB Cache SATA 22X DVD±R DVD Burner - OEM
Total: $830.92 *(Not including shipping and rebates)
Now if we add that gts 250 1 gig down below for $160 that leaves $108 for a psu and the OP makes his intended budget of
$1,100. Not to mention he has a rig that should overclock very decent.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130469 $159.99
EVGA 01G-P3-1155-TR GeForce GTS 250 1GB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card - Retail
Free Call of Duty: World at War w/ purchase, limited offer
Good deal on a gtx 260 down below.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130370 $189.99 ($169.99 after $20.00 Mail-In Rebate)
EVGA 896-P3-1260-AR GeForce GTX 260 896MB 448-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card - Retail
Free Call of Duty: World at War w/ purchase, limited offer