I use the Resonessence Concero with it as a DDC, and I've tried the Stello U3 and Izmo M1, all of which are very good. I've never gone higher though, so no Empirical Offramp 5 or Audiophilleo with battery power.
That is, unfortunately, not how it works. If I were you, I would start by filtering out DACs by feature set; then start collecting impressions on all that are left. Here are a couple of more names after the Anedio D2 to get you started:
NAD M51, Mytek Stereo 192, PWD 2, Zodiac Gold + PSU (also the Zodiac Silver)
A little while ago people were hot on the W4S DACs too.
That's really good advice.