I currently have and love my Zenith MKIII. I've upgraded many components around it but do not feel the need/desire to upgrade the Zenith. That may be because I recently upgraded to a Meitner MA3 streamer DAC.
i mostly stream Qobuz through Roon and the CD's I ripped on the Zenith. I am using the Zenith as a Roon core. Very smooth, detailed and musical. At this point I am finished but for the pending factory upgrade to the MA3 and my Audeze Crbn HdPhns, until the upgradeitis 'bug' hits me again.