I just got that case/PSU combo (except with the 850W PSU), and you should be very happy with it.
For the HDD, people almost always recommend the Spinpoint F3. Although, with the current discount on the WD drive, there's not really a big price difference.
For RAM, you may want to get a set with tighter timings like thishttp://www.newegg.com/Product/Product.aspx?Item=N82E16820231321
Otherwise, looks like a good build.