Budget Civ 5 build

Anyone care to comment on my build? Other than web-surfing and watching video, my primary use will be playing Civilization 5 for hundreds of hours. I'm also planning on playing Fallout New Vegas and the next Elder Scrolls game when they come out. I plan to use this machine for 3-4 years, and might upgrade the video card if necessary in the future. I'm going to use this machine with a 1920 X 1080 monitor. I have a budget of $1300 so I'm trying to maximize my bang for the buck as much as possible. Is there anything I could do to tweak my build to get an even better bang for the buck ratio?

Ticket Number: 436097
Total Price with Instant Savings: $1,270.00

Direct Load URL: http://www.digitalstormonline.com/comploadsaved.asp?id=436097

Specifications:
Chassis Model: Special Deal Hot Seller - Cooler Master CM 690 II Advanced
Exterior Finish: - Standard Factory Finish
Trim Accents: - Standard Factory Finish
Processor: Intel Core i5 760 2.8GHz (Quad Core)
Motherboard: EVGA P55M SLI  (Intel P55 Chipset)
System Memory: 4GB DDR3 1333MHz Digital Storm Certified Performance Series (Highly Recommended) (Hand Tested)
Power Supply: 750W Digital Storm Certified (Dual SLI Compatible) (Silent Edition Recommended)
Expansion Bay: - No Thanks
Hard Drive Set 1: Operating System: 1x (320GB Western Digital (16MB Cache) (7200 RPM)
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 460 1GB (Includes PhysX Technology)
Add-on Card: - No Thanks
Sound Card: Integrated Motherboard Audio
Extreme Cooling: AIR: Stage 1: High Performance Cooler (Compatible With ONLY i5/AMD Processors)
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: - No Thanks
Enhancements: - No Thanks
Chassis Mods: - No Thanks
Noise Reduction: - No Thanks
Boost Processor: FREE: Stage 1: Overclock the processor between 3.3GHz to 3.9GHz (Cooling Upgrade Recommended)
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 7 Home Premium (64-Bit Edition)