I would also plug in Stenheim Alumine 3 or better Alumine 5 into the picture as the designer of those (Jean Pascal) is using Dart beside Nagra to voice them and also they often do the shows together (last example Hong Kong few weeks ago). Personally listened to Alumine 5 at his demo room driven by Dart and it was magical.
Good suggestion. I want to listen to this. Does he have analog?