For a system with one gfx card and an ssd + hdd you are quite safe with most motherboards. You want to check if their oc bios features fit your needs and any reports of coil whine. AsRock have been doing a lot of things right lately. In Sweden the 5 most popular choices are Asus motherboards. I have used Asus before but I kinda dislike their software. Anyway, it looks like a solid choice, I would probably have gone with EVGA,MSI or ASUS in that order but like I said above, the issues arise when you put in a second gfx card and 3 hdds and a PCIe ssd and an m2... then you want to start looking at lane distribution, which sata ports are turned off when using the m2, spacing between PCie slots etc etc...
I find it hard to justify upgrading from a 2700k@4.7 . If I had to go skylake now, I would probably focus on a high quality PSU and EVGA mobo to avoid coil whine. Which 970 are you getting?