@brewerslaw Sorry that was a brain freeze on my part. Didn't realize you're using Aries G2.1. In my case, I also use the S-280 streamer and connect it to the DAC via BNC, which I found to be superior to USB -- but of course, that's only in the context of Aavik DACs. Not saying that USB is inferior in all cases. Depends on the implementation.
And, yes, I found Ansuz cables (RCA) have excellent synergy with Aavik components, which in your case will be between the D-280 and I-280. Sorry for the confusion.