@fietty Are you going portable? Are you using headphone?
I'm using Styleaudio's dac and all I can say is that it sound good to me but sound/tastes are subjective hence I suggest you try them out to see if you like them.
The differences between those you listed are just the type of sound produced, portability, power to drive headphone.
Also you can try zero dac (cheaper, Jaben) and Maverick D1 (Jaben)...
@hoks I do not know but you can try calling Audiotrio or CD Acoustic, they should be able to help you...
Hope this helps...