Thanks for the clarification.
I am leaning Asus Z97-A/USB3.1 over the ASRock Z97 Extreme4
The ASRock 3.1 option is an extra board and more money and if I ever "need" M2 x4 an addon card is £12-£23.
The guy who makes the HD-Plex fanless cases is a big fan of ASRock but I just kind of feel better about Asus ? I don't really know why ??
P.