I use the Auralic via ethernet but as the router is one floor up from my system I use a TP link powerline adapter to get my ethernet. This set up was left over from a Lumin streamer I was using before that did not do wifi. I connect my Auralic to my DAC via USB although I could use coax, optical or, AES. I agree any of these options are cleaner than USB from a computer.
Soix used a DDC with the same DAC as mine and such first hand experience makes his opinion valuable to me. However, I don’t know what streamer he was using and how much of a factor your streamer plays into what benefit you get from a DDC. Do some streamer incorporate circuitry such that the benefits of a DDC are less than with others? Probably so and that’s why even though the advice we give and get in in this forum community is great, sometimes you just got to take the plunge and buy and try.
Geez.... I miss the old days where brick and mortar dealers were common and would sometimes let you take gear to try out at home before you made a purchase.