Build in progress: PWR supply ??

Is my power supply obviously too small?? I see lots of folks getting a strong suggestion to go to a 1000 watt PS. Is th e750 too small for me and if so, is it too late to change as I am "in build" stage 5. This is config. 249122.

Direct Load URL: http://www.digitalstormonline.com/comploadsaved.asp?id=249122

Specifications: 
Chassis Model: Digital Storm 850Si
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 Corsair Dominator DHX (High-Performance)
Power Supply: 750W PC Power & Cooling (Dual SLI Compatible) (Silencer Edition)
Card Reader: Internal Digital Media Card Reader (Black)
Hard Drive Set 1: Operating System: 150GB Western Digital VelociRaptor (10K RPM) (16MB Cache) (SATA) (Extreme Speed) 
Set 1 Raid Options: - No Thanks
Hard Drive Set 2: Multimedia\Data: 500GB Western Digital (16MB Cache) (7200 RPM) (SATA)
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: DVD±R/RW/CD-R/RW (DVD Writer 20x / CD-Writer 48x) 
Internet Access: High Speed Network Port (Supports High-Speed Cable / DSL / Network Connections)
Video Card: 1x NVIDIA GeForce GTX 285 1GB (Includes PhysX Technology) 
Add-on Card: - No Thanks
Sound Card: Integrated Motherboard Audio
Extreme Cooling: AIR: Stage 2: Cooler Master V8 (Compatible With i7 Processors)
Liquid Color:- Not Applicable, I do not have a H20: Stage 3 Cooling System Selected
Chassis Airflow: Standard Factory Chassis Fans 
Internal Lighting: Internal Chassis Lighting System (Blue)
Enhancements: - No Thanks 
Chassis Mods: - No Thanks
Boost Processor: Yes, Overclock the processor as much as possible with complete stability 
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) (For Enthusiasts) 
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

Thanks, dst4me