Need advice, tight budget.

I am going to buy a new gaming rig today or tomorrow and I want to know how good this configuration is. I play on 1680 x 1050 resolution on games such as WoW and various other rpgs and I intend to play starcraft 2.

Currently priced at $1739 and I really can't go higher than that, just want to make sure I'm getting the most for how much I'm spending and if anything go down a little.

Specifications: 
Chassis Model: Special Deal Hot Seller - Ironclad
Exterior Finish: - Not Available
Trim Accents: - Not Available
Processor: Intel Core i7 930 2.8GHz (Quad Core)
Motherboard: EVGA X58 Micro Edition SLI (Intel X58 Chipset) (Supports SLI or CrossFire)
System Memory: 6GB DDR3 1600MHz Digital Storm Certified Performance Series  (Highly Recommended) (Hand Tested)
Power Supply: 750W Digital Storm Certified (Dual SLI Compatible) (Silent Edition Recommended) 
Expansion Bay: - Not Available
Hard Drive Set 1: Operating System: 1x (500GB Western Digital (16MB Cache) (7200 RPM) (SATA)
Set 1 Raid Options: - No Thanks
Hard Drive Set 2: Multimedia\Data: - No Thanks
Hard Drive Set 3: Backup\Misc.: - No Thanks
Optical Drive 1: DVD±R/RW/CD-R/RW (DVD Writer 24x / CD-Writer 48x)
Optical Drive 2: - No Thanks
Internet Access: High Speed Network Port (Supports High-Speed Cable / DSL / Network Connections)
Video Card: 1x NVIDIA GeForce GTX 470 1.2GB (Includes PhysX Technology)
Add-on Card: - No Thanks
Sound Card: Integrated Motherboard Audio
Extreme Cooling: AIR: Stage 1: Noctua Dual 120mm Fans High Performance Cooler (Compatible With ONLY i7 Processors) 
H20 Tube Color:- Not Applicable, I do not have a FrostChill or Sub-Zero LCS Cooling System Selected
Chassis Airflow: Standard Factory Chassis Fans
Internal Lighting: - No Thanks
Enhancements: - Not Available
Chassis Mods: - Not Available
Noise Reduction: - Not Available
Boost Processor: FREE: Stage 1: Overclock the processor between 3.3GHz to 3.9GHz (Cooling Upgrade Recommended)
Boost Video Card: - Not Available
Boost Memory: - Not Available
Boost OS: - Not Available
Windows OS: Microsoft Windows 7 Professional (64-Bit Edition) 
Restore Kit: Digital Storm Specialized Recovery System (DVD Image Based)
Virus Protection: - Not Available
Office: - Not Available
Benchmarking: - Not Available
Install/Test Game: FREE: Hot-selling game with a NVIDIA GeForce GTS 250 or above graphics card 
Display: - No Thanks
Surge Shield: - No Thanks
Speakers: - No Thanks
Keyboard: Razer Lycosa Gaming USB Desktop (Multimedia Keyboard) 
Mouse: - No Thanks
External Storage: - No Thanks
Exclusive T-Shirt: FREE: Digital Storm T-Shirt - Black (Xtra Large) 
Priority Build: - No Thanks, Ship Within 5-15 Business Days After Order Is Successfully Processed
Warranty: 3 Year Limited Warranty with Life-Time Customer Support (3 Year Labor & 1 Year Parts)