Lumin U2 Mini

In this case I wouldn’t worry about a lateral move — it’s a solid bet either the Lumin or Innuos will provide significant sonic benefits you’ll hear immediately.  Did you load any CDs into the Vault?  I’ve got a lot of CDs I love that will likely never be available to stream and I have several “audiophile” CDs I’m going to buy that also will likely never make it to stream as well so for those reasons I find the server function very valuable.  But that’s me.  It’s awesome that you can audition a piece at home!  Now if you only had a good Lumin dealer nearby…

Yeah, it looks like their dealer network is small.   

There are several hundred discs , I have media on a 2TB drive also.    Can you move files across the network onto a dedicated streamers internal drive if I go that route?    

Much more efficient to move files direct than "across" the network. Use Unstoppable copier. So much better than UPnP that I sold my Synology. Why have multiple devices unnecessarily?

Maybe give Innuos a call, tell them you’re interested in their streamers and ask them how you can most effectively get your stored music into their server. Best to go right to the source, and their customer service has a good rep.