Upgrade advice please

[Guinny]

Looking for some advice please on possible upgrades in the GFX card area and the CPU.

I used to be right on the ball a few years back but have lost the plot when it comes to new hardware and upgrades so some help would be much appreciated!

What CPU can I upgrade to and which GFX card would be a nice upgrade -Thanks
System specs are:
Gigabyte EX58-UD3R Motherboard
Intel Core i7 2.66
AT1 Radeon 5800 HD
6GB ram

 

[Guinny]

Great - thanks for the input.

I am willing to spend up to £300 on a GFX card and would consider either Nvidia or ATI .....I asume driver cleaner will still assist if I change brands?

I guess a quite -ish card is also a must as I use the system for music production also!