I’m glad you’re enjoying the MK 2 DAC. Your experience is very similar to mine — it’s an amazing piece of equipment.
I’ve recently been experimenting with Qobuz. It seems to be a mixed bag. I posted here about something I just listened to and it was outstanding. But a number of the albums I’ve checked out on Qobuz sound mediocre or worse. I think this is due to the source material that they obtained as opposed to any issue with my AirLens or DAC. Have you had this same experience?