Ok, here's an either / or recommendation.
With SLI future support, or not.
CPU
Intel Core i5-2500K Sandy Bridge 3.3GHz (3.7GHz Turbo Boost) 4 x 256KB L2 Cache 6MB L3 Cache LGA 1155 95W Quad-Core Desktop Processor BX80623I52500K[/i]
**plus**
Scythe SCMG-2100 Sleeve CPU Cooler
$251
http://www.newegg.com/Product/ComboDealDetails.aspx?Ite...
Mobo
SLI option
ASUS P8P67 EVO (REV 3.0) LGA 1155 Intel P67 SATA 6Gb/s USB 3.0 ATX Intel Motherboard
$210
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
non-SLI option
ASUS P8P67 (REV 3.0) LGA 1155 Intel P67 SATA 6Gb/s USB 3.0 ATX Intel Motherboard
$165 http://www.newegg.com/Product/Product.aspx?Item=N82E168...
RAM + Video combo
G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-8GBXL
**plus**
SPARKLE SXX5801536D5NM GeForce GTX 580 (Fermi) 1536MB 384-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card
$545 (after rebate)
http://www.newegg.com/Product/ComboDealDetails.aspx?Ite...
Hard Drive
SAMSUNG Spinpoint F3 HD502HJ 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive
$50
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
(I’m only putting 500g drive in there, if you want something larger you can substitute)
Case+ Power Supply
SLI option
Antec DF-85 Black Computer Case
$160
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
(the twelve hundred is a good choice too)
Antec CP-1000 1000W Continuous ATX12V v2.3 / EPS12V v2.91 SLI Ready 80 PLUS Certified Modular Active PFC Power Supply Exclusively for - Twelve Hundred(1200)/P183/P193/DF-85
$150
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
non SLI option
Antec Three Hundred Illusion Black Steel ATX Mid Tower Computer Case
$70 http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Antec TruePower New TP-750 750W Continuous Power ATX12V V2.3 / EPS12V V2.91 SLI Certified CrossFire Ready 80 PLUS BRONZE Certified Active PFC "compatible with Core i7/Core i5" Power Supply
$100
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Operating System
Microsoft Windows 7 Home Premium 64-bit 1-Pack for System Builders - OEM
$100
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Optical Drive
LG Black 24X DVD+R 8X DVD+RW 16X DVD+R DL 24X DVD-R 6X DVD-RW 12X DVD-RAM 16X DVD-ROM 48X CD-R 32X CD-RW 48X CD-ROM SATA DVD Burner - Bulk - OEM
$19
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Total w/ SLI in future $1485
Total without SLI in future $1300
If you can swing it, I'd go with the SLI option.