I dont understand exactly what you are asking. Are you asking which of my DACs that I use sounds best (imo) while using Neutron as the music playing app? If that is the question, I can't answer it, as I do not actively use neutron for playback, just to tets compatibility to chime in to help others.
I have a Google Play Music All Access subscription and an unlimited verizon 4G data plan, so I stream 320k mp3 music without regard for data usage. This gets 90% of my playback time when using my phone. The other 10% of the time, I will be playing back FLAC files of various bit/sampling rates stored on my 64GB microSD card, and I use USB Audio Player Pro for that (to ensure the sampling rate is matched, since the Note 3's default USB audio driver plays back at either 48k or 96k, regardless of whether the DAC supports 44.1 and 88.2 as well).
Sorry that I can't help.