Re: PSU Advice...
I would go with the 580, but if you're going to pay that much, I would get a psu that you know would last, like an ocz. OCZ makes the best psu's out there right now, besides turbo cool's 1kw psu. But, if aviability is at a limit, the raidmax psu is still a good choice.
Macbook Pro and Logitech z5500s. All you really need.