So after I was unhappy with my SMAS (complete lack of bass, had to amplify the audio), I immediately ordered the KDMAS when I got an email saying they were on sale in the store (as I had given up my Kickstarter box back in the day for the 8K+ discount). Just arrived! I hooked them up, and now the audio quality is what I was hoping for - I was prepared for the worst when I first tried them out, but then I put on the ear-cups to turn them into actual on-ear headphones…damn what a difference that made, the bass made its appearance! They fit almost right over my ears (could be down a bit more)
Finally I can use my 8K+ by just putting them on and going, without feeling like a large part of the experience was missing/problematic (though to be fair, the headstrap design of the SMAS did leave plenty of room to wear my Sony WH-1000XM3 with it comfortably, even putting them on before the Pimax).
Having said that, I’ll still probably get the DMAS some day. But for now I am truly happy with my Pimax 8K+ in its “final” form.