I have heard that the XFX PSUs are pretty much just rebranded Seasonic and are usually pretty good. I did a little checking and seems to have good reviews.
I'll have to think about the board, that asus rob board looks pretty nice. I'd lose a bit of potential upgradeability in losing the PCIe 3.0 slots, but not really sure if that's worth worrying about or not.
Yeah, by the time pci 3.0 comes mainstream with all of the bugs worked out and cards developed with their bugs worked out and then giving a little time for prices to drop to affordable, you will probobly be ready to rebuild anyway.
I mean who knows if the 3.0 slots on the asrock board will even work for 3.0 until some cards start surfacing. Nothing to check it with means blind buying >