CyberPowerPC - Unleash The Power

How is this build from a gaming point of view?
Skyrim, BF3, Diablo III mainly

Case: CoolerMaster Storm Enforcer Mid-Tower Gaming Case Black w/ font I / O panel with USB 3, front 200mm red LED fan. [+30]
Freebies: None
Lights & Illumination: NONE
Extra Case Fan Upgrade: Max. 3 x 120mm Silent Case Cooling Fans in selected case key areas for ultra silent operation [+23] (1,200 RPM AKASA Silent Fans with Sleeve Ball Bearing 17 dBA and LED light to match the Fans already in the case)
Cyberpower Noise Reduction Technology: Cyberpower Anti-Vibration Fan Mounts -- reducing the noise transmitted from Fans [+9]
CPU: Intel® Core™ i5-3570K Quad Core 3.40 GHz 6MB Cache LGA1155 + HD Graphics ***Overclockable XXX***
Overclocking Service: XXX Overclocking (CPU Extreme overclock: guaranteed min. 20%, max. 30%.) [+49]
Overclock Monitoring and Media Server Station or Overclocking Media Server Station: NONE
Cooling Fan: Asetek 510LC / Xtremegear Liquid Cooling system w/ 120mm Radiator (For Slient and High Performance -- AKASA Silent Fans, 1200rpm w/ Sleeve Ball Bearing and LED light in Push-Pull Airflow ***Overclockable XXX*** [+10])
Coolant for Cyberpower Advance WaterCooling Kits: NONE
Motherboard: Asus P8Z77-V LX Intel Z77 Chipset DDR3 ATX Mainboard w/ 4 RAM slots, IRST, Lucid Virtu MVP, 7.1 HD Audio, GbLAN, 2x PCIe x16 (1 Gen3, 1 Gen2), 2x PCIe x1 & 3 PCI ***Overclockable XXX** [+8]
Intel Smart Response Technology for Z68 & Z77: None
Internal USB/SATA Expansion Module: NONE
Memory: 8GB (4x2GB) PC10666 DDR3/1333mhz Dual Channel Memory (Corsair XMS3 w/Heat Spreader [+12])
Video Card: NVIDIA GeForce GTX570 1280MB 16X PCI Express [+156] (Major Brand Power by NVIDIA)
Freebies: None
Dongles: NONE
Video Card 2: None, or On-Board Integrated Graphics
Video Card 3: None, or On-Board Integrated Graphics
Power Supply Upgrade: 1000 Watts Power Supplies [+96] (Cyberpower 1000watt Gaming Power Supply SLI/CrossFire Ready)
Hard Drive: 240 GB OCZ Agility 3 SATA III Gaming MLC Solid State Disk [+65] (Single Drive)
Data Hard Drive: 2TB SATA-III 6.0Gb/s 64M Cache 7200RPM Hard Drive [+79] (Single Hard Drive)
Hard Drive Cooler: None
External Hard Drive (USB 3.0/2.0/eSATA): None
USB Flash Drive: None
Optical Drive: 24X Double Layer Dual Format DVD±R/±RW + CD-R/RW DRIVE. (BLACK Colour)
Optical Drive 2: NONE
Sound: HIGH DEFINITION ON-BOARD 7.1 AUDIO
3D Vision Glasses: NONE
LCD Monitor: NONE
2nd Monitor: NONE
3rd Monitor: NONE
Speakers: NONE
Headset: None
Gaming Gear: None
Network: ONBOARD 10/100/1000 GIGABIT LAN PORT -- As standard on all PCs
Keyboard: NONE
Mouse: NONE
Mouse Pad: None
Extra Thermal Display: NONE
Wireless 802.11N Network Card: NONE
External Wireless Network Adapter: NONE
Wireless 802.11B/G/N Access Point: None
Bluetooth: None
Flash Media Reader/Writer: None
Video Camera: None
Cables: Lindy 2m HDMI to HDMI Male Black Cable [+6] (1 piece)
Power Surge Protection: None
IEEE 1394 Card: NONE
USB Port: Built-in USB 2.0 Ports
Ultra Care Option: None
Operating System: Microsoft® Windows® 7 Home Premium [+74] (64-bit Edition)
Media Center Remote & TV Tuner: None
Software: None
Freebies: None
Games: None
Fast Track Service: NONE
Insurance: NONE
Warranty Service: STANDARD WARRANTY: 3 Year Labour, 1 Year Parts, 1 Month Collect and Return plus Life-Time Technical Support
Home Installation Service: NONE

Set my budget to £1350 (no monitor, peripherals or services needed)
Comes in at £1320 inc VAT

Main areas i could use help with is the choice of motherboard and how much cooling will be needed.
How many fans? Which ones? Water cooled?

Suggestions and tweaks would be much appreciated
Thanks in advance

Should munch through skyrim and Diablo. But i have some suggestions aswell.

1. Main areas i could use help with is the choice of motherboard and how much cooling will be needed.

Should be fine in that case, but maybe look at a full tower case if you can stretch to it or a case with better fans like the Corsair 300/500R.

2. How many fans? Which ones? Water cooled?

Dont go for the quiet ones you suggested its not a quiet system so it will just be a waste of money. Stick with the standard fans or max fans. PROPER watercooling is always best, if you can afford a 240mm or 360mm kit go for it. If not the Aseteks are still pretty decent.

Suggestions:

1. Go for the 670 instead of the 570, the 570 is old tech and is already becoming outdated.

2. Lower your power supply to a branded 750W or 800W PSU (corsair is usually very good but pricier)

Otherwise it looks like you've done your research well!

Looks like you've tuned it nicely. Should be a really good system.

Unrelated. But it's nice to see another Pip fan! :)

Older but better especially for an overclocked CPU.