Streamer/Server to replace Innuos Zenith


I am looking to replace my Innuos Zenith mkIII. After the long anticipated wait of a few years for their own software and it is still a mess for iOS users I have decided its time to move on. What do you all suggest for something like the Zenith but hopefully a step up in sound quality? I still have a Roon license so I am OK with using a Roon based product.
Thank you
128x128jmphotography
If you want simple and a DAC / Streamer then second on Lumin X-1.  I had one and it was outstanding and simple to use.  
@verdantaudio,

A Nucleus as an upgrade for a Zenith Mk3? Are you antepodean or why is your world completely upside down? The Nucleus isn’t even in the same SQ ballpark.
@antigrunge2 
I guess I was thinking about the Nucleus as an “upgrade” vs a device that isn’t working.  I will also admit I was thinking of the Zen, not the Zenith.  Fair point, I should have scrolled back up.  
I too had similar frustrations with my Innous Zen and purchased an Auralic Altair. Since I'm primarily an Analog guy I didn't stress too much about trying to surpass the performance of the Zen which I really liked. I enjoy the Auralic as much or better and the Lightning DS software sounds wonderful to boot.
I interact via Andriod tablet and am experiencing the same frustration. Was previously running Roon core on my Zenith and it was functionally rock solid and of course the Roon interface is pretty sweet. I stream from Tidal and the current implementation leaves much to be desired. Even with this I am not ready to pull the chute just yet. I'm going to practice patience at least in the short term in hopes that Innuos get their act together.