I have 2GB of XTC OCZ Series DDR2 and want to upgrade to 4GB but is it worth spending the extra for 4GB of 8500? or for the same price i could get 8GB of 6400:
http://www.overclockers.co.uk/showproduct.php?prodid=MY-108-OC&groupid=701&catid=8&subcat=813
http://www.overclockers.co.uk/showproduct.php?prodid=MY-108-OC&groupid=701&catid=8&subcat=813