Welp, I just bit the bullet on a new build and ended up going with this board. It's been a solid 7 years on the current build (Z77x-UD5H + i5 3570k) and figured, I guess it's time. It was a tossup between this and the DESIGNARE, but since I don't have any TB devices at the moment, the price difference wasn't justifiable and I can add it later for slightly less. The new setup will arrive tomorrow and includes a new i7-9600k, 32GB of 3000Mhz RAM and 500GB of M.2 NVMe storage. Also in the upgrade will be a Vega 56 which I couldn't get to work in the old build (also part of the reason to upgrade).
Looking forward to having a good solid system for the next 7 years. I really appreciate the time other's have spent fleshing all this out for others like me. The only question I have at this point is which model to use for SMBIOS? I don't see any 9th gen i7s listed in any of the profiles. I would assume the iMac 19,2 since it's closest, unless the 19,1 would be better since it is 9th gen CPU?