Looks fine. The 1TB WD Black Drives have been off and on sale often as of late so try to fine one of those. I think the sale price has been around 80$. The 3570k is really only required if you intend to OC. Which I would always recommend with a modern processor anyway but some people refuse to do so.
As Stickmansam mentioned I would do the UD3H unless you really need those added features. I just did a high end build with one and I cannot really see the value in the cost.
As far as PSU goes....plan ahead. The draw of your system at the moment will be fairly minimal and a 500 watt PSU would certainly be enough. There are a few things to consider though. Well built PSUs pay for themselves. I have a corsair PSU in my HTPC that is nearly 9 years old and still runs beautifully. If you buy a nice PSU expect to keep it for multiple systems.
Also if your draw is only 460 watts buying a 500 watt PSU may not be ideal. Fist off it gives you no room to expand. Second it ensures you are working that PSU at its near max capability at most times lowering the life expectancy of the unit. Finally most PSUs are most efficient in converting power drawn to their output at the 60-80% capacity range.