My build sofar

I'm getting close to pulling the trigger on a DS system, hopefully by the middle of august. Anyway after much reading and studying this is my build sofar and I'm looking for input. When I upgrade my monitor I will be gaming at 1920x1200.

Ticket Number: 315510
Total Price with Instant Savings: $2,784.00

Specifications:
Chassis Model: Cooler Master HAF 932
Exterior Finish: - Standard Factory Finish
Interior Finish: - Standard Factory Finish
Trim Accents: - Standard Factory Finish
Processor: Intel Core i7 920 2.66GHz (Quad Core)
Motherboard: EVGA X58 3X SLI (Intel X58 Chipset) (Supports Triple SLI or
CrossFire)
System Memory: 6GB DDR3 1333MHz Digital Storm Certified by mushkin enhanced
(Highly Recommended) (Hand Tested)
Power Supply: 1000W Corsair HX (Dual/Triple/Quad SLI Compatible) (Silent
Edition)
Card Reader: - No Thanks
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 20x / CD-Writer 48x) (LightScribe
Edition)
Optical Drive 2: - No Thanks
Internet Access: High Speed Network Port (Supports High-Speed Cable / DSL /
Network Connections)
Video Card: 2x SLI Dual (NVIDIA GeForce GTX 275 896MB (Includes PhysX
Technology)
Add-on Card: - No Thanks
Sound Card: Integrated Motherboard Audio
Extreme Cooling: H20: Stage 3: High-Performance Liquid Chilled FrostBite System
For CPU
Liquid Color:UV Blue: Medium Glowing Non-conductive Fluid (Requires H20: Stage 3
& UV Lighting)
Chassis Airflow: Standard Factory Chassis Fans
Internal Lighting: Internal Chassis Lighting System (UV) (Creates Glowing Effect
For H20: Stage 3 UV Fluid)
Enhancements: - No Thanks
Chassis Mods: - No Thanks
Boost Processor: Stage 1: Overclock the processor between 3.3GHz to 3.9GHz
(Requires Air Cooling Upgrade)
Boost Video Card: - No Thanks, Please do not overclock my video card(s)
Boost Memory: - No Thanks, Please do not overclock my memory
Tweak Windows: - No Thanks, Please do not tweak the services on the operating
system
Windows OS: Microsoft Windows Vista Home Premium (64-Bit Edition) With Windows 7
Upgrade Coupon
Restore Kit: Digital Storm Specialized Recovery System (DVD Image Based)
Virus Protection: - No Thanks
Office: - No Thanks
Benchmarking: - No Thanks
Install/Test Game: - No Thanks
LCD Display: - No Thanks
Surge Shield: - No Thanks
Speakers: - No Thanks
Keyboard: - No Thanks
Mouse: - No Thanks
External Storage: - No Thanks
Exclusive T-Shirt: - No Thanks
Priority Build: - No Thanks, Ship Within 5-10 Business Days After Order Is
Successfully Processed
Warranty: 3 Year Platinum Care Extended Parts & Labor Warranty

I've debated on saving some money on a smaller power supply but I'm not sure if the 750 is enough? I don't want to be underpowered.