The USB output on the newer Aurenders are from the W20 design which Aurender states is quite good so Regen may not have much to improve on.
Synology 713+ -> Aurender N10 -> D 200 -> Legacy Audio Focus SE speakers. ClearAudio Emotion TT. Synergistic Atmosphere Level 3 UEF Speaker and Galileo (USB) Interconnects and Synergistic PowerCell UEF S - Virginia U. S. A.