@singintheblues If you are willing to take a chance with the GAN1, send it to TweakAudio.com and let Ric make the GAN1 sound good ($500). In stock form it is just OK. You have an great piece of gear but you just have not heard it yet.
A great front end for this is the Sonore OpticalRendu +
ultraDigital 1.5 - USB to SPDIF and i2s converter – Small Green Computer
It is ROON READY with volume control on the software (has to be with the GAN1).
I also used a Lumin X1 as a streamer to the GAN1 and controlled the volume with the LeedH volume control. This was another amazing way to control the GAN1. Lumin has a new streamer minus the DAC which is what is needed for the GAN1.
LUMIN U2 (luminmusic.com) (also has a remote control that works with the GAN1)
I bought a used Sonore OpticalRendu from Canada for $700 and will get it in 4 weeks. It will be used with the GAN1, which is idle at the moment. I had this setup before as I mention above.
I used fibre optic streaming for both scenarios I described. That is the only way I stream. Only limitation I had with the streamers I used was the difficulty in hooking up a sub. The Node supports it but it does not do fibre so I never considered it.