ODE 4 vs Custom Build

Hey guys, thanks for everyone who's helped me out so far, but I could use some more advice/feedback/opinions.

Right now I'm basically looking at three options.

Option 1: the current ODE V2 Level 4.

Option 2: waiting a month or two to see if the ODE 4 switches back to one of the newly released Nvidia cards (assuming I can be patient enough).

Option 3: the custom build below (which is almost identical to the ODE 4, except I added more memory, selected a GTX 670, and there's a different cooler and higher OC setting).

Chassis Model: Special Deal Hot Seller - Corsair Carbide 300R

Exterior Finish: - Standard Factory Finish

Trim Accents: - Standard Factory Finish

Processor: Intel Core i7 3770K 3.50 GHz (Unlocked CPU) (Quad Core) (Requires Z77 Motherboard)

Motherboard: ASUS P8Z77-V LX (Intel Z77 Chipset) (Does Not Support SLI or CrossFire)

System Memory: 16GB 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 (120GB Solid State (By: Corsair) (Model: Force GT Series CSSD-F120GBGT-BK) (SATA 6Gbps)

Set 1 Raid Options: - No Thanks

Hard Drive Set 2: Multimedia\Data: 1x (1TB Western Digital/Seagate/Hitachi/Samsung (7200 RPM) (32MB Cache)

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(s): 1x NVIDIA GeForce GTX 670 2GB (Includes PhysX)

Add-on Card: - No Thanks

Sound Card: Integrated Motherboard Audio

Extreme Cooling: H20: Stage 2: Digital Storm Vortex 120mm Radiator 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: - No Thanks

Enhancements: - No Thanks

Chassis Mods: - No Thanks

Noise Reduction: - No Thanks

LaserMark: - No Thanks

CPU Boost: Stage 2: Overclock CPU 4.5GHz to 4.8GHz (Requires Pro/Deluxe/Sabertooth Motherboard)

Graphics Boost: - No Thanks, Please do not overclock my video card(s)

Memory Boost: - No Thanks, Please do not overclock my memory

OS Boost: - No Thanks, Please do not tweak the services on the operating system

Windows OS: Microsoft Windows 7 Home Premium (64-Bit Edition)

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 10-15 Business Days After Order Is Successfully Processed

Warranty: Life-time Expert Customer Care with 3 Year Limited Warranty

Budget: around $2,000 (no higher than $2,150).

Use: gaming (on a single monitor), FRAPSing, and light video editing.

And, I also have a few questions concerning the custom build...

1. Should I upgrade to a better cooling system?

2. I'm not at all knowledgeable about overclocking. How does a higher overclock setting/stage benefit me (and do I have to activate it or does it happen automatically)? Just wondering if I should keep the OC at Stage 2 or downgrade to Stage 1 or remove the OC all together….

3. Anyone know the difference between:

1x (1TB Western Digital Caviar (7200 RPM) (Model: Black Edition) [+$179]

and

1x (1TB Western Digital/Seagate/Hitachi/Samsung (7200 RPM) (32MB Cache) [+$162]?

Is it worth getting the slightly faster HDD, or should I just save the extra $17?