I find this topic so difficult, personally.
In my local audio society, some of the very best rigs have great dacs and then have a raspberry pi or a mac mini or just a simplified computer (built with a kit) with good power supplies, good cabling, etc. for the streaming part. The emphasis is on everything around the streamer. This leaves flexibility for changes in DAC's.
I do see the logic in getting a one-box solution, especially if one has a good unit in mind and they like the sound of the DAC built in. And, of course, if they're willing to take the digital out from that unit into another, external DAC if their taste or curiousity changes.
For myself, I have a modded Orchid MHDT DAC that I really like and a Bluesound Node 2i. I have pressed people in other threads about whether they could hear a difference when they changed streamers, but there are almost no cases where someone had a controlled comparison to describe. They were almost always changing the DAC involved, too.
So, for now, I'm likely to continue taking the digital stream out of my Orchid, improving the power supply for it (PD Creative, Teddy Pardo, something), and then remaining focused on the other elements of my system.