The Build looks fine except for the garbage motherboard.
In the build as listed, the largest voltage regulation device in terms of current handling is on the GPU, the second largest voltage regulation device in terms of current handling is the motherboard, and the 3rd largest, is the PSU.
You've probably already been clued in on the importance of PSU quality but have failed to take into consideration that voltage regulation does not end at the PSU. If you want the build to have good quality power regulation with comfortable headroom throughout, then you'll need a more robust motherboard. The Gigabyte B85M D3H is compatible out of the box with Haswell Refresh E3's like the 1241 and is built really well for the money.
XFX PSU's are all good quality units OEM'd by Seasonic, so there's no reason for any PSU "purist" to give you any crap for that selection. Not sure what royal is on about there.