I am trying to figure out what to upgrade next. My current specs are AMD 955 BE, 4GB Tracer Ballistix, Sapphire 5750. Is crossfire worth it? Or should I get 2 more GB ram? What do you guys think? I could use a fan controller also and possible a new HD. I current score 7.2 or above on everything except my HD which is 5.3 on the windows score.