Gaming PC Advice, Pretty Please?

Hello! First of all, I must say that I'm extremely pleased to have stumbled across this wonderful website - I've been searching around for a few days, attempting to research different desktop configurations, and some of the sites/forums out there are scary!

Okay, on to the computer: I would like to purchase a desktop that will be used mainly for gaming.
1.) My budget is $2000.00, including monitor/keyboard/mouse, but not shipping
2.) I'll be playing mainly MMORPGS: WoW and Aion, Left for Dead 2
3.) I've no idea what resolution I'll play at - suggestions? I know that if I go beyond a 22 inch monitor I'd have to look at picking different components, yeah?
4.) I know I won't be able to build a top of the line rig for this budget, nor will I be able to play absolutely anything and everything I want. I would like, however, for the computer to be upgradeable enough that I don't have to start from scratch 2 years from now. I'd also (and I understand that this is a relative term) like something on the quiet side, if at all possible - that really isn't a priority, though.

To put all of this in perspective, I've been playing WoW on my two-year-old MacBook - anything will be an improvement over that.

Okay! So this is the configuration I'm hanging about:
http://www.digitalstormonline.com/comploadsaved.asp?id=409158

Specifications:
Chassis Model: Special Deal Hot Seller - Cooler Master HAF 932
Exterior Finish: - Not Available
Trim Accents: - Not Available
Processor: Intel Core i7 930 2.8GHz (Quad Core)
Motherboard: EVGA X58 LE 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 Corsair TX (Dual SLI Compatible)
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: DVDąR/RW/CD-R/RW (DVD Writer 22x / CD-Writer 48x)
Optical Drive 2: - No Thanks
Internet Access: Wireless-G 108Mbps (Supports 802.11g/b)
Video Card: 1x ATI Radeon HD 5850 1GB
Add-on Card: - No Thanks
Sound Card: Integrated Motherboard Audio
Extreme Cooling: H20: Stage 2: Asetek Liquid CPU Cooler (120mm Radiator) (Great Value)
H20 Tube Color:- Not Available
Chassis Airflow: Standard Factory Chassis Fans
Internal Lighting: Internal Chassis Lighting System (Red)
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 Home Premium (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: - Not Available
Display: Acer 19 inch (Widescreen) (Black Edition) (High-Value Display)
Surge Shield: - No Thanks
Speakers: Logitech 2 Piece (Black Edition) Amplified Speaker Set
Keyboard: Logitech Internet 350 USB Desktop (Multimedia Keyboard + RX300 Optical Wheel Mouse)
Mouse: - No Thanks
External Storage: - No Thanks
Exclusive T-Shirt: - No Thanks
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


I've no idea whether the H2O vs. Air cooling is better? Any help or suggestions you have are welcome. Thank you so much for your time!

EDIT: added config



Edited by Ally - 24 May 2010 at 11:11pm

Hey, it sounds like your in a similiar situation to me. If you go down a few threads on this page or page 2, you should see my post about a 2,000 mmorpg pc. Most of your choices are ones that were recommended to me. As far as the cooling is concerned, the consensus seems to be that the Noctua coolers are better than the Asetek cooling. So I would switch to the stage 1 for that. As far as monitors and resolutions go, if I understand correctly, the bigger the monitor and resolution the more powerful graphics card you need. I don't know if you will be able to run everyone on max settings with the 5850 but it should certainly be decent. I'll let others that are more experienced add to this, but I'm planning on ordering one pretty much like the one you configured soon.   

My pleasure. Good luck. 

Ya Raif said it all, do not go with asetek.