I believe this is just a board upgrade/ swap for you... not sure why you wouldn't go that route vs adding yet another cable into the signal path?
Is it worth adding a Schiit Audio Eitr?
I've got an Aurender N100H running to a Schiit Audio Gumby (Gen 2 USB, not the Gen 5) via a Curious Cable and the ISO REGEN powered by the Ultracap LPS-1. I truly enjoy the soundstage provided by this setup, but I still have a bit more noise than I had when I was using a digital input via digital coax. Would the Schiit Eitr help to lower the noise floor further. Does it make sense to add it to the signal path?