Probably 6850 a55 uming the rest of your machine is up to spec. You can get them for around 100 if you look hard enough, or somewhere like overclockers did a deal with one for 112 + postage inc deus ex AND dirt 3. Quality deal that.

The games themselves are still worth at least 30 quid together

My machine isn't up to spec 4GB ddr2 2x2GHz processor, it's pretty . Should I get a new mobo with better ram and processor first?

Sounds like a rebuild to me luckily you can get some filthy cheap quad cores and DDR3 RAM these days

I dunno, got it off ebay like 2 years ago lol

I don't really know what I'm looking for or how much I should be paying tbh links would be cool if you can be a*sed

Get an ati 5750 and new psu, something like corsair cx430. That should kick console' a*se

That would cost you about 120 quid

not really, I use my PC for gaming and I need a new graphics card in order to play the newer games properly, so gtfo

Try for a nvidia card like gtx 460 ti