1st PC build help

[C4LL4N]

Hey guys i am looking to get a gaming computer that will play BF3 well. I also need advice on a PSU how big what brand etc.

Approximate Purchase Date: Before Wednesday

Budget Range:£900

System Usage from Most to Least Important: BF3, gaming, surfing the internet, watching movies

I need a keyboard, mouse and monitor but not in this budget suggestions would be appreciated.

Preferred Website(s) for Parts: No preference as long as it delivers to England

Country: England

Parts Preferences: Intel cpu and nvidia gpu

Overclocking: Yes but keeping it stable

SLI or Crossfire: Yes when i need a boost

Monitor Resolution: suggestions please

Additional Comments: here are my thoughts so far

MOBO : ASRock FATAL1TY Z77 PROFESSIONAL

GPU : GeForce GTX 670

HDD : 1TB Seagate Barracuda Green 3.5" SATA 3GB/s Internal Hard Drive

RAM : Corsair Vengeance Low Profile 8GB (2x4GB) DDR3

CPU : Intel Core i5-3570K 3.40GHz

Case : Fractal Design Define XL Titanium V2 Full Tower Soundproof Chassis w/ USB3.0

PSU : ???

thanks in advance

 

[Why_Me]

Looks good. Grab a 750w psu. Look for Seasonic, XFX, Corsair, Antec, Enermax, or Silverstone.