I need help choosing parts, I need a new Monitor, keyboard, and headset. I've been looking at the i3 2120 or FX-4100. I'm definetly getting an HD 7770, and am leaning towards an Antec 300 case. I would use it for casual gaming (steam & minecraft) , editing videos (after effects, vegas, etc.) and web browsing. Thanks! I plan on spending $600 MAX. Anything lower is nice.