Hi DJM,
Melco has been promising Roon endpoint capability “soon” for at least 3 years, so perhaps 2020 will be the year that it arrives.
If you want what a Melco unit does but with Roon endpoint as well, then the default choice would probably be something like an Innuos Zenith III. That is what the UK Chord representative recommended to me as the Roon compatible server to go with a TT2 or DAVE.
As an alternative, Small Green Computer in the USA is in a commercial alliance with Audiostore in the UK. I think that SGC uses Audiostore’s Vortexbox server software and Audiostore uses SGC server hardware, so they are equivalent. Martin Smith at the Audiostore is a very friendly and hugely knowledgable source of help & advice if you should ever call him.
So, if you want to stream using Roon, which we do, an Innuos Zenith would be an excellent benchmark. It can run as both Roon Core and Roon endpoint. When comparing a number of streamers, we used an Innuos Statement as music store, with a Roon Nucleus+ as Roon Core. Unsurprisingly, this combination sounded rather nice too. Hence, you have several possible configurations if you go with Innuos.
We have also tried a Melco unit as music store (the £5k, 6TB hard drive one) with a Nucleus+ as Roon Core. This was very good too.
With the Nucleus+/Statement pairing, we compared a DCS Network Bridge with an Auralic Aries G2, both acting as Roon end points to feed a Chord M Scaler + DAVE dac combination into a NAC252/300 & Kudos Titan 606 system. The Aries G2 sounded consistently better when running Roon software than when running Auralic’s own (a surprising result to both the dealer and to us) but the DCS Network Bridge bettered the Aries G2 by some margin to those present at the time.
We ended up buying an Audiostore Prestige 3 server. At first we used it as both Roon Core and Roon end point, feeding the Chord combo and it works well in this mode into our Naim 52/135s. We subsequently added a Sonore Rendu and that improved matters further. The Prestige 3 server now acts as music store (it has a 2TB SSD inside, as well as an optional drive for ripping cds) and Roon Core, leaving the Rendu to be the Roon end point.
I hope this helps a bit, as there are many different routes and options for a streaming front end these days.
Best regards, BF