£477.31 in my bank. Pc?

I'm currently writing this from my iPod 4 so sorry for any annoying auto corrects and shit.
So anyway I've been looking at building a pc for a while now I've looked through loads of forums threads posts reviews looking for the cheapest computer I could get. 
It came to £263.10
I have exactly £477.31 in my bank lol dw I don't have a job
What is the best gaming computer l can buy for this much I don't really want to spend all of my money and keep in mind ineed to buy a monitor and m/k 
Thanks in advance 

currency in £'s

Hey, think you could list any parts you are thinking of buying. If you are in the UK, cheapest reliable website that I found is http://www.scan.co.uk/ Great support team, and cheapest on most things. Just thought I'd throw it in there.

Thanks

this is what I'm to build:

CPU: intel core i3-2130 £89.99

mobo: Gigabyte GA-h61ma-d3v £42.15

ram: GeIL EVO veloce hot-rod red 8gb (2x4gb) £39.95

case: ocuk Imp micro ATX tower case £29.99

OD: ocuk 22x DVD rw £13.99

total: £259.16

any parts I shouldn't cheap out on?

thanks

Forgot to add

HDD: WD caviar blue 500gb £43.09

scan.co.uk have real bad customer service. i ordered a wireless card from there 3 weeks ago it went out of stock and has now been overdue back in for 2 and a half weeks when i tried phoning them they said dont know. 

my adivce is got to aria.co.uk they are cheap and good customer service or overclockers.co.uk they are extremely good customer dservice although they arent the cheapest, but in my opinion there customer sevice is worth paying for it makes you feel like royalty haha yuour every wish is their command ^.^

Any full specs i can follow?

If the PC will be for gaming, I would either get a graphics card, or swap the i3 for an AMD APU, the Intel graphics can't be compared too much with the APU. 

Also what PSU will you be using, please don't skimp out and but a £10 one, get a known brand, even though it will be an extremely low power PC, less that 450W.

 

my final order will be 

cpu: AMD phenom ii x4 955 black edition £71.99

gpu: msi Hd 7850 1GB £119.99

hdd:wd caviar blue 500GB £46.99

psu: Xfx pro 450w core edition £43.99

mobo: asus m5a78l-MLx £41.99

case: xigmatek Helios xtk231 £24.98

ram: Kingston hyper x blu 4gb (2x2gb) £23.99

OD: ocuk 22x DVD rw £13.99

any recommendations would be appreciated.

switch to a 1x4 gb stick, that way it's easier to upgrade to 8 later