I'm using an 8800gt on a 22" wide screen monitor with a native resolution of 1680x1050.
It's been a while since I've played WOW but I would expect it to run beautifully on my set up.
I did mod the video card with a high end heat sink/fan which knocked 20+ degrees off of my load temps.
Modred189 has been giving you good advice through this whole thread.
This is my very first post on this forum but I'm by no means a beginner to overclocking. Take my advice too... A noob can burn up a processor just as well as an expert by getting a cheap/unproven heatsink. The fact that...