Well, the difference between 3.0ghz and 2.83ghz stock speeds is negligable, plus the Q9550 can be overclocked.

With all 4 cores now firing, I'm seeing a very noticible improvement in performance, especially in WOTLK zones. While the dual core previously worked fine, it was choppy in some areas - now it's very smooth with frame rates between 40 and 70 consistantly on the main.

Clov