Just curious as to how much of an improvement in performance I would see upgrading my system as it states above, since my 2006 machine is 3 years old and getting close to the end of my apple care, figured I would trade it in and upgrade.
So for most apps the new quad 2.66 or quad 2.93 will be faster
And the new quad 2.66 will still blow your old machine out of the water despite lower clock speed. The single quad 2.66 beats last years 8 core 2.8 Harpertown, despite half the cores and lower clock speeds.