Help with my configuration

My current machine is failing so I am looking into a new gaming rig despite the fact that I am not currently playing anything.  Normally I play MMOs and not much else (LOTRO, AoC, etc..). 

My idea with this configuration is to keep it cheap but allow for upgrading the RAM and video card when I need the performance boost.  I will be using my current video card for now (8800 GTS 512mb OC).  I am open to possibly going SLI at some point, but its more likely I will stick with single card upgrades.  I think I will eventually get 8gb of RAM... seems to be cheaper to get the RAM off newegg than buy it preinstalled.

I am skimping on the motherboard... is this going to be ok?  From what I found, all the boards are pretty similar.

Do I really need a 750W ps?  Future video cards are my consideration.

Will stage 1 cooling be sufficient?  MY video card doesn't run too hot.

I've got an external HD so no need to get 2.

Is the extra $226 for the Q9550 2.83ghz processor worth it?

Here is the configuration:

Chassis: Antec 900
Exterior Finish: - Standard Factory Finish
Interior Finish: - Standard Factory Finish
Power Supply: 750W Corsair HX (Dual SLI Compatible) (Silent Edition)
Processor: Intel Core 2 Quad Q9450 2.66GHz (1333MHz FSB) (12MB Cache)
Motherboard: CLEARANCE PRICED: NVIDIA 680i LT SLI Core 2 Quad (Chipset: nForce 680i SLI)
System Memory: 2GB DDR2 Corsair at 800MHz XMS2
Card Reader: - No Thanks
Hard Drive 1: 500GB Western Digital (16MB Cache) (7200 RPM) (SATA)
Hard Drive 2: - No Thanks
Raid Option: - No Thanks
Hard Drive 3: - No Thanks
Optical Drive 1: DVD±R/RW/CD-R/RW (DVD Writer 20x / CD-Writer 48x)
Optical Drive 2: - No Thanks
Wireless Access: High Speed Network Port (Supports High-Speed Cable / DSL / Network Connections)
Video Card: - No Thanks, I will be installing my own video card(s)
TV Tuner: - No Thanks
Sound Card: Creative Sound Blaster X-Fi XtremeGamer
Extreme Cooling: Air Cooled Stage 1 (Certified Digital Storm Heat-sink)
Internal Lighting: Blizzard Internal Lighting (Blue Edition) (Cold Cathode Tubes)
Modifications: - 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)
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 my keyboard comes with a mouse
External Storage: - No Thanks
Warranty: 3 Year Platinum Care Extended Parts & Labor Warranty

Thanks for your help!

I have to agree with Lawdog on the Stage 3 cooling especially if you are doing an OC. Stage 1 cooling will not be enough.

If you want to OC then go with liquid cooling, you will get lot higher speeds from it. If not liquid then atleast stage 3, otherwise drop the OC from your config.

Go with 4GB of ram.

Go with 4 year warranty

You got no graphic card but you getting a sound card? why not drop the sound card and call DS and ask them to install the graphic card you want? Its gonna be tough testing your PC without a graphic card.