@maprik
Probably the most significant issue with streaming to my understanding is the bit rate. Your provider can send you a stream that by all indications your equipment identifies as 16 bit or high res when in fact, you're receiving a compressed low bit copy. Your ears aren't fooling you.
I'm very much a physical media person, vinyl and silver disc as well enjoying our abundant local and high-quality local FM broadcasts. As far as parity between the sound of vinyl and digital silver discs they are about equal and I don't experience any audible transition between the two, I'm as comfortable listening to one or the other. It has mainly to do with your source components and them not having any significant sonic character of their own. Each has to be at least as good as the other.
Looks like your Mearason is as good as it gets and its probably what you're feeding it, Lumin supposedly makes great streamers and they're highly regarded. Follow both manufacturers' recommendations for the appropriate interconnections or interface and leave it at that.