I just got a ZENith NG in the store, as Roon Core to my MSB Select.
It's been a long time since I compared network vs USB on the MSB DAC, and I did just now, and the ZENith NG closed that gap *big time*. It used to be, for me, that the Renderer was a clear, obvious winner, but now, it's a lot less so, and I've had clients who actually preferred the USB presentation through the NG.
I'll be showing it at the forthcoming Capital Audio Fest, in a few weeks!