I'd change that PSU to a decent one (I swear by Corsair).Those GT640 GPUs are nothing special either, I'd swap that for a GTX660 or GTX660TI. I'd also avoid OCZ drives like the plague, as they have a history of dying. Samsung seem to be offering the best reliability at the moment. (Tied the Crucial, but after owning Crucial drives I'm not convinced by their firmware support).
Other than that, looks good!
Although to be honest I'd spend more on the case. That's the bit you look at every day, and it makes a difference having a nice one, trust me.
Oh, and you don't want that internal DVD drive, they make your case look very ugly on the inside. You should get a USB one that sits on your desk just under your monitor like me.