How is my build? + N00B Questions

Hi guys, I configured a build through IBUYPOWER(don't tell me to use some other company or build my one, i would use cyberpower but they dont have the case i want), and here's what it is. Btw, heres what I want in the system. Im going to probably overclock it, and my budget is 1000-1200. I'm going to mainly use it for gaming. Read until the end of post. I really appreciate responses and suggestions.

Computer:
Case: NZXT Phantom 410 Gaming Case
Processor: Intel® Core™ i5-3570K Processor (4x 3.40GHz/6MB L3 Cache)
Processor Cooling: Asetek 550LC Liquid CPU Cooling System (Intel) w/ ARC Dual Silent High Perfornamce Fan Upgrade (Push-Pull Airflow)-The reason im getting liquid cooling is for 2 things. 1, Im going to end up overclocking my computer. 2, It's not going to be stored in an area with very good ventilation(in a spot inside my desk, with only a little opening for air, unless I find a better place to store it.
Memory: 8 GB [4 GB X2] DDR3-1600 Memory Module(Corsair Vengeance)
Video Card: NVIDIA GeForce GTX 560 Ti - 1GB
Motherboard: ASRock Z77 Extreme4 -- 2x PCI-E 3.0 x16, 4x USB 3.0
Power Supply: 800 Watt- Standard
Primary Hard Drive: 1 TB HARD DRIVE -- 32M Cache, 7200 RPM, 6.0Gb/s - Single Drive
Sound Card: 3D Premium Surround Sound Onboard
Network Card: Onboard LAN Network (Gb or 10/100)

QUESTIONS(I KNOW THERE N00B QUESTIONS): Will my motherboard support the graphic card I choose? If I choose the ARC Dual Silent High Performance Fan Upgrade (Push-Pull Airflow), will it get rid of the liquid cooling?(I don't want that to happen) Did I choose the right memory type? I saw 1600,1333,and 1866. Is my power supply good? And, should I upgrade the Sound or Network Card? Last question, should I get 2GB of Graphic Card? It's 50 dollars more.

A HUGE THANKS GOES TO THE PEOPLE WHO RESPOND!!!