This rig is going to be used to play DX11 and DX10 games as well as a few older DX9 titles on a HP w2338h monitor @ 1920 x 1080 resolution with most graphical settings maxed or slightly lowered to get the best framerate without compromising too much visual fidelity. I would consider this rig to be a high quality build that will be more than capable of handling future upgrades. Now I do realize that the i5-750 doesn't do hyper threading but with 4 cores, it will serve it's intended purpose quite well as the CPU does benchmark very high. You could easily tweak this and move up to an i7-860 but I wanted to keep costs down. For me, with taxes and shipping...the system will be just under $1,500.00.
Here is where the i5-750 and i7-860 benchmark...
http://www.anandtech.com/cpuchipsets/sh ... &p=16&cp=2
As you can see, the i5-750 can in certain cases outperform and i7-920.
From www.newegg.com

COOLER MASTER Storm Sniper SGC-6000-KXN1-GP Black Computer Case
Item #:N82E16811119194
$129.991

MSI P55-GD65 ATX Intel Motherboard
Item #:N82E16813130239
$159.99

XFX Radeon HD 5850 (Cypress Pro) HD-585A-ZNDC XXX Edition Video Card
Item #:N82E16814150455
$329.99

CORSAIR CMPSU-650TX 650W Compatible with Core i7 Power Supply
Item #:N82E16817139005
$99.99

Intel Core i5-750 2.66GHz LGA 1156 95W Quad-Core Processor
Item #:N82E16819115215
$199.99

G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory
Item #:N82E16820231303
$229.98 **********Price is for 2 kits****************

Western Digital Caviar Black 1TB 3.5" SATA 3.0Gb/s Internal Hard Drive -Bare Drive
Item #:N82E16822136284
$99.99

LITE-ON 24X DVD Writer Black SATA Model iHAS-324-98
Item #:N82E16827106334
$29.99

Microsoft Windows 7 Home Premium 64-bit 1-Pack for System Builders
Item #:N82E16832116754
$104.99
Grand Total:$1,384.90 *********Does not include taxes or shipping***********
If anyone would like to add on or tweak the rig I will incorporate it into my post.
Enjoy!
+++++++++++++ALTERNATES PROVIDED BY SG COMMUNITY++++++++++++++++++++++++++
YARDofSTUF tweak
http://www.newegg.com/Product/Product.a ... 6811119216
COOLER MASTER CM690 II Advanced Black Steel body / Plastic + Mesh bezel ATX Mid Tower Computer Case - $99.99
loop2kil tweak
LIAN LI PC-7FN Black Aluminum ATX Mid Tower Computer Case - $119.99
http://www.newegg.com/Product/Product.a ... 6811112249