Advice on a new system, budget £1800

I have a budget of £1800 to build a new gaming rig. I have been playing PC games since I was 15 (now 21), and although this is quite some time working with components and upgrades to my systems over the years, I still have little knowledge on what is best, and what is just over-priced.

I want to buy it from PC Specialist; a UK web-based custom PC Company. Here is what I have included so far:

CPU - i7 3930K (3.2Ghz) 12MB Cache
Motherboard - ASUS P9X79 Pro: Intel Socket LG2011
RAM - 16GB (4x4GB) Quad-DDR3 2133MHz X.M.P (Kingston HyperX Genesis)
G-Card - 4GB Nvidia GeForce GTX680 2 DVI
Hard Disk - 2TB 3.5" SATA-III 6GB/s HDD 7200RPM 64MB Cache

Power Supply: Corsair TX650 V2-80 Plus Bronze
CPU Cooler - Intel certified liquid cooler for LG2011

Case: COOLERMASTER HAF 912 Plus

Brings me to £1673

My question is simply, what have I chosen there that is simply overpriced and glorified, and what do you think I could include that could make the PC better overall? I.E. Am I paying for something with a big price tag due to its label or because it actually performs well?


Also I would like to hit the £1800 if possible, so if you think I could spend more on certain items and components please let me know. Ideally I wanted to get a 3D monitor with glasses, but I'm not sure if I'd rather blow it all out on a better PC rather than the perk of 3D gaming.

Thanks in advance!