I auditioned the Sonnet Morpheus and Hermes a month ago (and also Lab12 Dac1). My impression was that the Morpheus was really bright sounding compared to the Lab12 Dac1. So I would try to pair it with speakers that are more laidback to balance it out.
Perhaps an Amphion Argon 3s or Dali Rubicon 2 might fit the bill.