Hello,
Please strongly consider a z390 Stinger ITX. I would be be in line to purchase one. I'm sure many more would be too.
I don't know what your sales are like on the ITX stuff, but I'll tell you what. It's nearly impossible to find anything EVGA and ITX in stock anywhere or on eBay. When it is, the price is exuberant. I can't imagine it's that bad.
Thanks,
CPU: Intel 4790K
COOLER: EVGA 92mm
MOBO: EVGA Z97 Stinger
RAM: Corsair Dominator 16GB
GPU: EVGA 780 ti
SSD: Samsung 850 Pro
HDD: WD Red 2TB
CASE: EVGA Hadron Air