I have replaced the Zen with an Audio-GD DI 20 HE. Simply connected to a NUC PC via USB iit plays on a higher level as the Zen. My ZEN installation included 2 Ferrum Hypsos power supplies, a Sonore OM with some other expensive network stuff. Compared to that the Audio- GD is a bargain.
And it is still in the burn in phase…
And it is still in the burn in phase…