UK new gaming pc suggestions

[thribbles]

So im looking to build my first PC, ive helped build a system before so i have the knowledge but im not particulary aware of what components are good. Im looking to spend at the most £600 and would like to be able to game at a decent level of FPS on 1280x768.
Basically what im asking for is suggestions on components for the system. I dont need any of the peripheals like a monitor or keyboard and i have no bias to intel or AMD. whatever is most effective.
thank you in advance.

 

[metal orient]

Please fill this out:
http://www.tomshardware.co.uk/forum/261222-13-build-advice

At your resolution you could probably do a build for around £400 and max out the graphics options

 

[thribbles]

Approximate Purchase Date: not bothered, im in no rush

Budget Range: £400-600 including 1280x 768 monitor

System Usage: gaming primarily

Parts Not Required: Keyboard, mouse and speakers

Preferred Website(s) for Parts: any UK based retailer

Country: United Kingdom

Parts Preferences: by brand or type: not bothered, whatever will be most effective

Overclocking: a little on the CPU/Graphics card

SLI or Crossfire: If it is the most effective for the system

Monitor Resolution: 1280x768

Additional Comments: quiet if possible, but im not massively worried as long as its reliable

 

[metal orient]

Intel Core i3-2100 £86
https://www.aria.co.uk/SuperSpecials/Intel+Core+i3-2100+3.10GHz+%28Sandybridge%29+Socket+LGA1155+Processor+-+Retail+?productId=43839

Gigabyte GA-H61MA-D3V GEN3 £47
https://www.aria.co.uk/Products/Components/Motherboards/Intel+1155+H61+%28B3%29/Gigabyte+GA-H61MA-D3V+GEN3+Intel+H61+%28REV+B3%29+Socket+1155+DDR3+PCI-Express+Motherboard+?productId=48248

8GB Mushkin Blackline #996995 (2x4GB) DDR3 1600MHz 9-9-9-24 £39
https://www.aria.co.uk/Products/Components/Memory/DDR3/Dual+Channel+1600MHz/8GB+Mushkin+Blackline+%23996995+%282x4GB%29+DDR3+1600MHz+9-9-9-24+?productId=44336

Asus HD 6850 DirectCU V2 £96
https://www.aria.co.uk/SuperSpecials/Asus+HD+6850+DirectCU+V2+1024MB+GDDR5+PCI-Express+Graphics+Card+?productId=42291

500GB Western Digital Caviar Blue £60
https://www.aria.co.uk/SuperSpecials/500GB+Western+Digital+Caviar+Blue+WD5000AAKX+3.5%22+SATA+III+Hard+Drive+?productId=43780

550W XFX Core Edition
https://www.aria.co.uk/Products/Components/Power+Supplies/650W+or+less/550W+XFX+Core+Edition+80PLUS+Bronze+Power+Supply+%28Seasonic+OEM%29+?productId=45332

BitFenix Shinobi Black £40
https://www.aria.co.uk/Products/Components/Cases/MIDI+Tower/BitFenix+Shinobi+Black+Midi+Tower+Chassis+?productId=45934

MICROSOFT Windows Home Premium 7 SP1 64-bit £70
https://www.aria.co.uk/Products/Software/Operating+Systems/MICROSOFT+Windows+Home+Premium+7+SP1+64-bit+EN+1pk+-+OEM+%5BGFC-02050%5D+?productId=38272

Total cost £499.97

You can save in a number of places, such as using a pentium cpu, 4 instead of 8GB of RAM, a cheaper H61 motherboard and a 6770 rather than a 6850.
There is no chance of overclocking the cpu on this build, if you'd like to do that you'd need a Z68 Mobo and a i5 K series cpu (about £80 more)