Help! Gaming!

Hey there, looking into a new computer! I'm really not sure where I need to invest the extra money and where I can cut a little. In this config I have the i5 processor instead of the i7. How much of a difference in real world performance can I expect? Same with the graphics card, and so on.

Budget: Dear lord, hopefully under 2k. As much as possible without sacrificing too much performance for what I need.

Expectations: Gaming. WoW and LoL currently (as well as some Skyrim) but the future games as well. I'm pretty sick of the lag in WoW. Mild image editing and general use other than that.

Special needs? Well. It's pretty dusty here, and we have a lot of animals. My computer gets pretty gunked up because of that. Quietness is definitely a factor for me, as my current computer sounds like a jet engine.

I'm going to have a lot of questions here.

Ticket Number: 619171
Total Price with Instant Savings: $1,793.00


Specifications:
Chassis Model: Special Deal Hot Seller - Black OPS Assassin Edition
Exterior Finish: - Standard Factory Finish
Trim Accents: - Standard Factory Finish
Processor: Intel Core i5 2500K 3.30GHz (Unlocked CPU for Extreme Overclocking) (Quad Core)
Motherboard: ASUS P8P67-M PRO (Intel P67 Chipset) (New & Improved B3 Revision Without SATA 3G Issue) <b></b>
System Memory: 8GB DDR3 1600MHz Digital Storm Certified Performance Series (Highly Recommended) (Hand Tested)
Power Supply: 800W Corsair GS (Dual SLI Compatible)
Expansion Bay: - No Thanks
Hard Drive Set 1: Operating System: 1x (500GB Western Digital Caviar (7200 RPM) (16MB Cache) (Model: Blue Edition)
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 560 Ti 1GB (PhysX Technology) (Overclocked EVGA Edition) <b></b>
Add-on Card: - No Thanks
Sound Card: Integrated Motherboard Audio
Extreme Cooling: H20: Stage 2: Digital Storm Vortex Liquid CPU Cooler (High-Performance Edition)
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: Internal Chassis Lighting System (UV) (Creates Glowing Effect for H20 Tubes) <b></b>
Enhancements: - No Thanks
Chassis Mods: - No Thanks
Noise Reduction: - No Thanks
LaserMark: Digital Storm LaserMark Service - Graphic (Non-Window Metal Side Panel) <b></b>
Boost Processor: FREE: Overclock the processor between 3.3GHz to 3.9GHz
Boost Video Card: - No Thanks, Please do not overclock my video card(s)
Boost Memory: - No Thanks, Please do not overclock my memory
Boost OS: - No Thanks, Please do not tweak the services on the operating system
Windows OS: Microsoft Windows Vista Ultimate (32-Bit Edition)  <b></b>
Recovery Tools: Windows Recovery Toolkit (Bundled with Windows 7 CD)
Virus Protection: - No Thanks
Office: - No Thanks
Game: - No Thanks
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 5-15 Business Days After Order Is Successfully Processed
Warranty: Life-time Expert Customer Care with 3 Year Limited Warranty

For this budget, I think you're much better off going with an ODE system. The price/performance ratio is the highest here. Ode Level 1 will have all of this + a few other features for cheaper.

with the m pro mobo and sli you are not gonna have pci lanes open for any other pci card.

also do you need sli? what res you gonna be gaming at?

I would take frank's build and change mobo to z68 pro and psu to 750w hx, its more powerful then the 800w.