Building a dual-core desktop PC

So I gathered together whatever hardware I could manage, and I built a new system. Here's a quick look at the components, with my justification for each choice. Note that my hardware choices weren't intended to be the most EXTREME possible, as if my PC were auditioning for some Mountain Dew commercial. I was aiming for a good price-performance ratio, and I wasn't shy about using perfectly good components from my parts shelf or my old PC.