Have you considered a PS Audio Direct Stream or Direct Stream Junior?
I own the Ayre QB9 DSD and a DSJ. I use the Ayre QB9 as my dedicated headphone DAC. I have A/B’ed them, DSJ was more revealing in the midrange and upper frequencies. Little bit better defined lower end, as well. I have nothing but good things to say about the DSJ and PS Audio.
They do firmware updates periodically, which you can alternate between them for different sound profiles, depending on which one you prefer.
I own the Ayre QB9 DSD and a DSJ. I use the Ayre QB9 as my dedicated headphone DAC. I have A/B’ed them, DSJ was more revealing in the midrange and upper frequencies. Little bit better defined lower end, as well. I have nothing but good things to say about the DSJ and PS Audio.
They do firmware updates periodically, which you can alternate between them for different sound profiles, depending on which one you prefer.