Gaming upgrade - recommendations please

Hi,
Here's my set-up:
Asus M4A79XTD EVO
2 times HD 4850 512MB (in crossfire)
AMD Phenom II X4 965 Black Edition
6GB 1333mhz RAM (Kingston)
128GB OCZ Vertex Plus Series SATA II SSD
600w coolermaster silent PSU
W7 O/S

nothing overclocked
What is the next best upgrade to make in order to get a noticeable difference in gaming?

thanks in advance

Well If you want better gaming performance. The upgrade would be the GPU. What is the budget you have for the upgrade?

£200 overall

Where do you live? Would you be able to purchase online? Maybe consider grabbing a HD 7850 or 7870. Either of those cards would be a nice upgrade.

Yep, I can order online.
thanks

Is that £200 plus the sale of your 4850's?

For £200 your best bet is probably the 7870, if you can stretch it to £300 then the GTX 670 is a great card.

http://www.scan.co.uk/products/2gb-...5-28nm-gpu-1000mhz-1280-cores-dl-dvi-hdmi-mdp

Theres a gpu sale at scan.co.uk at the moment.

Good timing

thanks guys - if I do go for the 7870, will there be any remaining 'bottlenecks'?
& Yes, it's £200 including whatever I sell

You can probably go for the 7950 then, AMD are also giving away 3 free games. Most 7950's overclock extremely well.
You shouldn't have any bottlenecks and it should be a huge upgrade. Good luck!