Preferred Website(s) for Parts: newegg preferred. microcenter is a drive away if the price is right.
Parts Preferences: Intel for CPU and ATI for GPU
SLI or Crossfire: Maybe, if 1 card can handle 3 monitors. Xfire most likely.
Additional Comments: Updating my current system that is going to my girlfriend. Might as well go semi big. I don't know what monitors are good enough for it. My original prospect(prices and availability changed since i last looked into it so I need to swap around a few parts):