New rig needed, suggestions?

[bbK]

Hey i recently bought BF2 and i'd like to upgrade my pc so that it runs the game better lol, my current setup is as follows;

AMD Barton 2500+
1.5gb PC2700 Ram (2x512 dual chan + 1x512)
Radeon 9800 pro 128mb gfx
MSI K7n2 delta-l mobo
antec 430w truepower psu

I've been out of the mix for a while now so im not sure about the new stuff on the market so im hoping someone would be kind enough to help me out.

Ideally i'd want to spend around £500 may spend a little more depending on what is available and how much funds i can spare.

Thanks in advance

 

[bbK]

forgot to mention just need new mobo/cpu/ram/gfx and psu if the 1 i have already is not good enough.