lol.. I still have a northwood 3.0ghz as my primary PC. I love it. Playing Dragon Age at Full Quality on it as a matter of fact. In fact... Thanks to consoles slowing down the CPU/Graphics push in gaming I will not have to upgrade until 2014 after 360 and PS3 get replaced... lol.. (as a matter of principal)
I used to brag to my friends with 2Ghz C2D's that my 3Ghz was faster at single thread.. Then I wrote my own stupid benchmark program to prove it.. I was wrong. 2Ghz C2D is 32% faster even in a single thread than a 3Ghz Northwood. http://astro.temple.edu/
All that being said, and as much as I love it, unfortunately it is seriously outclassed these days so I must disagree.