Looking for a Z370 MB for dedicated DAW

So in 1956 I won an apple pie at a church social by guessing the number of beans in a jar. That was followed by a long dry spell punctuated by two lotto tickets that paid slightly more than they cost, until I entered the i7 8086k giveaway and won one of these overhyped chips. My practice had been to build a DAW from of outdated parts, and I typically succeeded in getting adequate performance for total cost less than the price of a state of the art cpu. I had planned to wait until the chipmakers had come up with a hardware fix for the speculative execution exploits that keep turning up, but I am getting old, and the likelihood of that happening in my lifetime is beginning to seem remote, and besides a dedicated DAW is unlikely to be targeted. So now I am researching how to mount and interface this freebie for something less than the price of the chip itself. Total cost would include a case, at least two hard drives and a minimum of 2 x 8 GB of memory. Most of the other parts I have scattered around.
 
I have no interest in running WiFi on a DAW and see little use in gen 2 USB 3.1 since anything over USB 2 is unlikely to be useful for my humble audio interface (Scarlett 6i6) which is mainly used for MIDI-softsynth output and mixing. Hence waiting and paying more for a Z390 MB looks like a waste. I am not averse to air cooled OC'ing and would like the opportunity to try it at least if the need arises, but otherwise my requirements are humble. Most of these boards will have more than adequate USB, SATA, and memory capacity. The capability to run two monitors off the on chip graphics would be a plus. Dancing lights (other than diagnostic leds) and other decorative crap are a major waste. One consideration is that if I outgrow the motherboard, I will need another Win10 license to replace it adding significantly to the cost. 
 
Does anyone have experience with motherboards that they would care to share?

ASUS builds a dozen boards with that socket and the differences between them for raw computing are not significant.

One idea would be to look at cyberpowerpc.com and pick a deal that is 8700k (basically your chip) and drop off everything you don't need. They have cheap options for most everything, so might come close to your goal, but sub-$400 would be a stretch.

BTW, the case colors is a strip that plugs into the MB, just unplug it if it bothers you.

The 8086k is an excellent DAW performer.
Six physical cores (12 processing threads) that can be locked at 5GHz.
With the right cooler, it's near dead silent.
It's the perfect balance of cost/performance/quiet.

I always try to spend under $150 on a motherboard.  I don't need a lot of features.  I stick with AsRock, Asus, and Gigabyte.  Right now I think it is not a favorable time to build a PC.   Graphics cards and RAM are still high for me.