What PSU to get for my i3 Build

[Fras]

here is the build im confused on what Wattage power supply to get, i need it to be reasonably cheap around £50.

Gigabyte GA-H55M-UD2H Intel H55 (Socket 1156)
Sapphire ATI Radeon HD 5770 1024MB GDDR5
Samsung SpinPoint F3 500GB Hard Drive
Corsair CWCH50-1 Cooling Hydro Series H50
Casecom 6788 Black Mid Tower Case with Full Black Interior/Exterior 120mm Blue LED Front Fan - No PSU
OCZ DDR3 PC3-12800 Platinum Dual Channel Enhanced Bandwidth Edition
Samsung SH-S223 22X DVD±RW DL & RAM
Also, I will most likely be overclocking and this computer will be used for gaming mainly.
Thanks In advance - Fras

 

[Mr Krugga]

Corsair CX 400W

 

[Fras]

Will 400W be enough consider i will overclock?

 

[stulid]

plenty

 

[Fras]

Thanks Guys, cant thank you enough.