Hello @gnaudio , First, I completely agree that the Streamer is very essential and will can vastly improve the sound of digital, just as a quality DAC. As an example, the wonderful Mola Mola Tambaqui DAC, while housing a decent renderer, is no match for a quality streamer. Examples that have been in my system include an Auralic Aries G2.2, and Aurender N20 and the amazing XACT S1. The software used is also a factor, but let's avoid that for a moment, as user preference and sound quality factor here.
But, everything matters (in the case for digital) and I am referring to what is upstream of the streamer. If you look at my system, I employ a very nice LPS on my modem, two stacked switches with again quality LPS, and quality ethernet cables. Each of these upgrades has yielded easily heard sonic improvements. For a system of your quality, I feel these steps are essential, likely similar to the steps taken to get to a great sound from your analog rig.
And I second your statement that those who do not believe / understand / hear this need not chirp.
My streaming of high res files sounds better than a CD.