Upgrade GFX card

[malicht]

I'm just thinking at the moment about what would be a decent gfx card upgrade for my pc.

these are my specs:

AMD Phenom(tm) II X3 720 Processor 2.80 GHz
8.00 GB RAM
300GIG HDD
2 x ATI Radeon 4850 (xfire)
Gigabyte GA-MA790XT-UD4P Motherboard
Corsair TX650W PSU

I've just bought an SSD drive and a new 1TB HDD, and I'm thinking about a new card next.

I'm not really sure if its worth buying a new card though with this processor.

Thoughts?

 

[malicht]

Sorry forgot to mention. Looking at about the £200 quid mark maximum.

 

[MORE SPEED]

This pretty much sums it up: http://forums.overclockers.co.uk/showthread.php?t=18395090

7850.

 

[malicht]

Ta very much!