I recently build a PC similar to what you're looking at. I would recommend an ATI graphics card, better models right now. Thats a pricey mobo you've picked, are you planning on running 2 ggraphics cards? That would also explain the 700W power supply. What are you planning on doing with this PC ? Also, for an additional $20 you can nearly double the size of that hard rive... just sayin.
Read thorugh this thread. Helped me select quality parts and made a huge difference for me. Have a look at the Lian Li cases as well, I got one and its a really good aluminum case for a reasonable price.