My rig and cooling question

Hi guys, I just placed my order for a new rig and I have one question, is the Noctua 120mm fans enough for my rig? Even if the processor is OC'ed?? I'm new to this so thanks for the help.

Config:

System Configuration:
Chassis Model: Special Deal Hot Seller - Cooler Master 942 HAF X
Exterior Finish: - Standard Factory Finish
Trim Accents: - Standard Factory Finish
Processor: Intel Core i7 950 3.06GHz (Quad Core)
Motherboard: EVGA X58 SLI 3 Edition (Intel X58 Chipset) (Features USB 3.0 and SATA 6Gb/s) (Model: 131-GT-E767)
System Memory: 6GB DDR3 1600MHz 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 (40GB Solid State (By: Intel) (Model: X-25V Edition) (Extreme Performance)
Set 1 Raid Options: - No Thanks
Hard Drive Set 2: Multimedia\Data: 1x (1TB Hitachi/Seagate (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 480 1.5GB (Includes PhysX Technology)
Add-on Card: - No Thanks
Sound Card: Integrated Motherboard Audio
Extreme Cooling: AIR: Stage 1: Noctua Dual 120mm Fans High Performance Cooler (Compatible With ONLY i7 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
CPU Boost: FREE: Stage 1: Overclock the processor between 3.3GHz to 3.9GHz (Cooling Upgrade Recommended)
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)
Restore Kit: Digital Storm Specialized Recovery System (DVD Image Based)
Virus Protection: - No Thanks
Office: - No Thanks
Benchmarking: - No Thanks
Pre-Install Game: FREE: Hot-selling game with a NVIDIA GeForce GTS 250 or above graphics card
Display: - No Thanks
Surge Shield: - No Thanks
Speakers: - No Thanks
Keyboard: - No Thanks
Mouse: - No Thanks
External Storage: - No Thanks
Exclusive T-Shirt: FREE: Digital Storm T-Shirt - Black (Large)
Priority Build: - No Thanks, Ship Within 5-15 Business Days After Order Is Successfully Processed
Warranty: FREE PROMO: Life-time Expert Customer Care with 4 Year Limited Warranty

yup, as dranza said

yes, even overclocked your processor should be healthy for at least 4 years under a noctua, and you can always tune down the overclock to increase that time, or just ask DSO to not go over 3.5 (or whatever) which is still a good range

The clock speed stays at the OCed clock speed and will not go up or down. For your motherboard it will come with EVGA E-LEET program that allows you to do that.

Yes you can set the voltage the bios. I don't know about the optimal voltage since each cpu is slightly different some may require higher or lower voltage to be stable. Although if you are going to overclock the processor, depending on how much you are going to overclock it and the processor the voltage needed to be stable may be higher than 1.2V. For example my i7 930 overclocked to 3.9 need a voltage of 1.365 for it to be stable.

Ah I see, you guys are so helpful and some times when I try to look for the answers through search engine and within the forum I don't always get the exact answers. I have full trust for DSO and I'll be super happy if my desktop can last for 4-5 years and I will definitely be buying more things from DSO for years to come hehe. I just want to say everyone here is the BEST!!!!