Ok thanks for all the great info guys. I'd like to update my scenario though. I'm not a hardcore gamer first of all. I only plan on playing Spore, Sims 3, C&C, Starcraft, and maybe Warhammer Online. I'm not into FPS so I would think I'm not going to need the greatest GPU. I have a budget of $650 for the computer itself not including the monitor. So can someone please reccomend me a good motherboard/CPU/GPU combination for what I will be using this computer for? Thanks!

ALSO I'm really thinking about buying a cheaper GPU thats capable of SLI incase I ever want to double my graphics capabilities. =p