hey guys i'm thinking about upgrading my current core 2 duo 2.16ghz imac with a shiny new aluminum one (maybe today ). mine has been having problems running it for a while, random system lock ups and all sorts of stuff. thinking about springing for the higher end 21.5" model. can anyone with this model tell me what kind of performance i can expect? what graphic settings can you run? WoW is the most taxing program i'll run on the computer, and i do play quite a bit so its important to me to be able to run it well... i'm not interested in running everything at ultra, but right now it's killing me running the lowest settings and still having huge performance problems. i also posted this in the main imac forum, not sure which would be more appropriate.