I should be able to get a copy of Windows through my school. Possibly free maybe for a discount. Regardless my friends school gives its students a free copy of Windows 7 when they request it so I think I'm good.

I'm going to grab a couple fans for the case as well. I want this baby to be cold in the Summer. Any suggestion on those? I got all the peripherals (mouse, keyboard, monitor, speakers) already but will upgrade them later on. Anything that I may want or may be missing. I don't want to start building this thing only to realize that I don't have the X that plug into the Y.