To be quite definative, it depends. For many streaming is the primary source. If that is so then I would think the streaming device quality should be conmensurate with downstream equipment.
+1 daledeee1, based on my having followed threads herein I would optomize the signal going to the streamer prior to upgrading it.
All this based from one who has streamed only from computer and do little of it. I am considering the purchase of my 1st true streamer. A process I started 8 months ago. I will likely go with a modest but quality one, most likely the recent Node. My next upgrade will likely be a new transport. If I find I streaming to become a major source then I would optomize signal to the streamer.