I5-2500 3.3ghz, 850mhz, which GPU ?

what is your budget?
what are your pc specs?
5670 with 1 gb gddr5 is better. or a 6670 with 1 gb gddr5 (slightly upgraded 5670).

What will you use the rig for? What is your budget? What power supply are you using? We need a lot more information.

GIGABYTE GeForce GTX 550 Ti ~$119.99 (99.99 after rebate)
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
I would suggest getting a sound card ^.^"
For optimum rendering speed, more ram (8 totally enough) and use quicksynch...
The Z68 is just marginally superior to the P67 chipset, you might want to change up for combo deals from where you purchase the CPU.

hi

overall budget for PC is £600 to £700 GBP

for audio editing production / and some video editing


CPU
i5-2500 3.3ghz, 850mhz


Motherboard
GIGABYTE GA-Z68XP-UD3


GPU
GIGABYTE GV-R567D3-1GI Radeon HD 5670 1GB 128-bit DDR3 PCI Express or
Asus HD 5670 Graphics Card EAH5670/DI/1GD5



Harddrives
WD Caviar Black 1TB x 2 or
Samsung Spinpoint 1TB x 2


RAM
8GM Corsair Vengeance RAM


DVDRW
LG 22x SATA GH22NS70


PSU
Corsair 500W CMPSU-500CXUK


Case
Coolermaster Elite 430 Black Mid Tower Computer Case

still stuck on the graphic card/motherboard combo