I suggest custom build as it saves a lot of money. I had to upgrade my motherboard and cpu and video card, so a whole rebuild. not very hard to do. just put in the right spot and push in. The instruction might not be helpful but internet is helpful.
So go cusom build and get an even better machine.(or donate it all to me

)
With that money you should get......
Video card GeForce 8800gts/x Gaming for the future. Direct 10 games will begin being released and you will probably want to play them.
CPU Core 2 duo (any depending on prices)
RAM 2 or more giggs of DDR2. C2D and AM2 cpu's have a motherboard that only have DDR2. (Games are needing more and more RAM these days)
Powere Supply 1000mh(or whatever the speed is) With just the video card alone you'll need over 500mh(same as above) and then there is the other stuff, and when you upgrade.
Also some coolers might be good. Video card and CPU can make one *hec* of a racket.
Get a good monitor with the money you get from your old computer(sell it, come on, you know you want to!! Most people are like"I need a computer, oooo this one is only 400 pounds. I'm getting that!"
If you have enough money left over get the G15 (keyboard) and MX518 (mouse)
AND... if you still have money left over, sell you joystick and buy a better one e.g. lates one from saitek.(noooooooo the name left my brain!!!!!)
So if you budget cn be stretched by selling this is the way to go.......... Or donate your budget and the money from your computer to me
