I got a bargin for my setup at that time (last year) . I'm still very pleased with performace thats why I never went C2D.
My system response is better then my mates [email protected] as i have low latency on Ram.
any ways its deffo not feasible for me to get C2D with my CPU@3Ghz (dualcore) unless I go for Quad @3-3.5Ghz
Guess ram matters more on AMD systems, my ram at 850 4-3-3-10 compared to 667 3-3-3-10 has no difference.