Hey all, I am very interested in buying warhammer online when it come out in september. I currently am using one of the 20" 2.66GHz Intel Core 2 Duo imacs. I also have bootcamp with windows vista home premium installed. I am worried now though that Warhammer online won't work very well with my graphics card. I'm not a fan of choppy game play at all. I am wondering if there is any way for me to upgrade my graphics card. If not has anyone tried demos or beta on a 20" imac?