Newbie new I7 gaming computer

This is my first time putting a computer together: does anyone have any advice on if these components work well together, good for the money or if I forgot something.

The ideas is to stay near or under 1000, yet get a computer that can play all games out there in good to great resolution.



Purchase time: with in next 7 days

Price range: $900-$1100

PARTS NOT REQUIRED: keyboard, mouse, monitor, speakers, OS

Not married to any site, use Newegg for looking though






Motherboard:

GIGABYTE GA-EX58-UD3R LGA 1366 Intel X58 ATX Intel Motherboard

CPU:

Intel Core i7 920 Nehalem 2.66GHz LGA 1366 130W Quad-Core Processor

Case:

Antec Three Hundred Black Steel ATX Mid Tower Computer

Memory:

OCZ Gold 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600

Hard Drive”

Western Digital Caviar SE16 WD6400AAKS 640GB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive

Video Card:

SAPPHIRE 100259-1GL Radeon HD 4870 1GB

CD Drive:

LG 22X DVD±R DVD Burner Black IDE Model GH22NP20

Power Supply:

SIGMA SHARK SP-635 635W ATX12V V2.01 SLI Ready Power Supply

Cooling Unit:

XIGMATEK Dark Knight-S1283V 120mm Long Life Bearing CPU Cooler



give me all your ideas thanks,

J