Maximus VII Impact is best Mini ITX board. She have very nice sound card for motherboard,
actually better you will not find even on bigger motherboars. That's very important for Mini ITX because no place for dedicate sound.
And power section is little better, more phases compare to Z97i.
Here you can compare details
https://www.asus.com/rs/Motherboards/MAXIMUS_VII_IMPACT/https://www.asus.com/rs/Motherboards/Z97IPLUS/Did you thought to wait few weeks before Maximus VIII impact show up with support for Skylake processors.
In Serbia you can find everything from ROG and almost everything from ASUS, if they don't have at the moment they could import for 2 weeks.
But prices are 10-20% higher than in Germany. For Bulgaria I'm not sure, they are in EU maybe is better...
You should make decision what you want, now Maximus VII Impact with Devil Canyon or Maximus VIII Impact with Skylake.
Maybe you should think and about Maximus VIII Gene, for me somehow hard core gaming RIG is not possible without at least mATX.
I mean hard core RIG is possible but without options for fast new devices for OS, M.2 PCI-E SSD, dedicate sound, maybe Thunderbolt card,...
Yes Mini ITX is small and cue but max you can get is good CPU and one Graphic card and sound if you choose Impact version.
And I plan in future to build smaller RIG, 650D is my last Mid tower case. But I will concentrate on mATX factor because place for sound card, PCI-E SSD, even always there are chance to find cheaper second GPU. And off course I want to stay with X chipset. Because of that for me is important to ASUS continue X99M-WS tradition with single PCI-E x1 or x4 slot, this year lack of 32Gbps transfer on M.2 was not acceptable.