While I wish @Lothar_Wolf the best and want him to enjoy his collection, personal tastes vary a lot. I tried a bunch of ZMFs at CAF. Every single time: open…that’s nice…closed…ugg, move on…open…that’s nice…closed…ugg, move on…
I could indeed hear the quality differences between drivers/price tiers. Atrium Open $2.5K was quite nice and perhaps my favorite. However, I strongly preferred the Audeze LCD-5 ($4.5K) over the Caldera ($3.5K). I tried but would not pursue the Aeolus or Bokeh $1K tier myself.