First get the Phenom II 955 BE its $20 cheaper and its the same processor and being unlocked multiplier being a black edition anyone can just increase the multiplier to match the clock speed to 3.4ghz
Second dont get the Hitachi they are not known to be all that reliable and there ar faster options out anyway.
SAMSUNG Spinpoint F3 HD103SJ 1TBhttp://www.newegg.com/Product/Product.aspx?Item=N82E16822152185
This would be a much better choice in drives everything else looks great.
Your PSU is a little overkill a 550 watt unit would be more than plenty but the 750 watt unit will give you plenty of headroom for upgrades in the future. So if you plan on a more powerful GPU or a crossfire setup stick with the 750 but if you are gonna stick with the setup you listed for a while and you are trying to pinch a few pennies a 550 watt unit from corsair would be more than enough power.