Best server to house Roon and 4 TB of music feeding DCS Vivaldi Upsampler and Dac

+1 Verdantaudio......but I would throw one more in there.  Lucas Audio Music Servers out of the UK and Poland.  Lucas Domansky is a computer genius.  I considered many music servers including Taiko, Antipodes, Pink Faux, and Aurender before settling on Lucas Audio.  Even if you do not buy, give Lucas a call using What's App or send him an email. I live in Arizona and his customer service is 24/7.  He set me up remotely and downloaded my 8tbs of music from a Synology NAS to the LDMS.  I have a Lampi Pacific DAC and the LDMS elevated the SQ immensely.  It can't hurt to check him out

I will second the Wolf.  I have a Luna R server with 4TB onboard and it can handle as much external storage as you might want.  Dead quiet, wonderful sound quality, exceptional support for Joe P - you cannot do better!

Contact Wolf Audio in Jacksonville FL and speak to Joe Parvey.  My Wolf Alpha 3 can have up to 12TB of internal SS drives, I believe, though I use a 20TB NAS on my network for music storage.  I use Roon as my interface and  its perfectly quiet.

For this level of gear, I can’t imagine not looking at Taiko, Pink Faun or the Antipodes Oladra. Those are the best of the best in terms of servers that are not brand specific like Wadax. The choice should be driven by what input you plan to use and the best way to get clocking to synchronize.

I would have to contact Antipodes or Pink Faun to determine optimal method for connection as I am not sure the best way to ensure optimal clocking. Same with Taiko but I don’t have a direct line of communication with them like I do the others.

Hmmm.   I use Roon and a less expensive streamer (which sounds great).  I have a NUC to run the core on.

I didn't think Aurender worked as a roon endpoint.  So I am surprised by your setup.  Perhaps Roon is seeing your Upsampler/DAC?   I know with my USBridge streamer Roon actually sees my M-scaler (like the streamer is transparent).

So I've been thinking about a high end streamer.  Leaning toward the Innous because it has an onboard stransport/ripper and so I can get rid of my CD transport.   It is also Roon ready.  But I don't think they go up to 4 TB.  

someone else will have to talk about the virtues of and external SSD drive. I know they all support that but don't know how seamless and quality that is.

Jerry