Case: Antec Three Hundred Two Premium AB All Black Gaming Series Mid-ATX w/ 1x 140mm Blue Twocool / 2x 120mm Blue Twocool -- *Canada Computers Exclusive* $59.99 w/ MIR
http://canadacomputers.com/product_info.php?cPath=6_112&item_id=045469
CPU: Intel Core i5-2500K Quad-Core Socket LGA1155, 3.30Ghz, 6MB L3 Cache, 32nm (Retail Boxed) (BX80623I52500K) (Sandy Bridge architecture a MUST) $229.99
http://canadacomputers.com/product_info.php?cPath=4_65&item_id=035530
Motherboard: Asus P8P67 Deluxe (Rev.3.0) Socket 1155 Intel P67 Chipset CrossfireX/SLI Dual-Channel DDR3 2133(O.C.)/1866(O.C.)/1600/1333Mhz 3x PCI-Express 2.0 x16 Dual GigaLAN 8-CH High Definition Audio 4x SATA 6.0Gb/s 4x SATA 3.0Gb/s 4x USB 3.0 2xFirewire Bluetooth v2.1 ATX 189.99 w/ MIR
http://canadacomputers.com/product_info.php?cPath=26_722&item_id=036779
GPU: Asus ENGTX560 Ti DCII/2DI/1GD5 nVidia GeForce GTX 560 Ti Chipset (830Mhz) 1GB (4000Mhz) GDDR5 Dual Dual-Link DVI-I/Mini HDMI Display PCI-Express 2.0 Graphics Card $219.99 w/ Disc. & MIR
http://canadacomputers.com/product_info.php?cPath=43_557_559&item_id=036683
RAM: Corsair Vengeance Red 8GB (2x4GB) DDR3 1600MHz CL9 1.5V DIMM (CMZ8GX3M2A1600C9R) $48.99
http://canadacomputers.com/product_info.php?cPath=24_311_312_612&item_id=044391
PSU: OCZ ModXStream Pro 700W Power Supply (OCZ700MXSP) $59.99
http://canadacomputers.com/product_info.php?cPath=33_443&item_id=020479
HDD: Seagate Barracuda (ST1000DM003) SATA3 6.0Gb/s 1TB 64MB Cache (OEM) $89.99
http://canadacomputers.com/product_info.php?cPath=15_1086_210_212&item_id=042240
Total before tax: $898.93
After Tax: $1015.79
I recommended this build for my GF's brother. He wanted something that could play a majority of games on high setting at a decent resolution (22-24" monitors) with enough horsepower to last a year or two.
Anyway, for basically $1000, this rig should be fine. Other members will probably swap some parts for others. Look for the deals.