I'm looking to upgrade my system over the next 2-3 months, I'd appreciate any suggestions on what you think would be worth upgrading from my current setup. I enjoy gaming. I am mainly looking at graphics, CPU, hard drive and possibly the motherboard but if you think something else could do with an upgrade don't hesitate to mention it. I'd have about £150 max to spend on each component. I can go higher but want to limit myself for financial reasons. You can see my current system setup in my signature below.
 
Many thanks in advance.

What's the total budget? Beside gaming, what are the other uses?

[quotemsg=1825897,2,81147]What's the total budget? Beside gaming, what are the other uses?[/quotemsg
 
No more than £500 max.  And it is mainly for gaming and perhaps the odd photo/video editing.  

Ok, gaming & multimedia editing, your best upgrades would be a quad core cpu like Q6600 & a HD4870. I think they just fit the bill. Oh and if you can, try and squeeze another 2 gigs of ram into the upgrades.