Can't add to the streamer question. I would say that there's a great fall off IMHO with streamers on the whole. I've modified a WiiM Pro with external 5v power supply and run fiber router to a Cisco Meraki (p/s removed).
Then fiber to another Cisco Meraki and a short ethernet Blue Jeans ethernet. Also, I have an isolation rig set up for the WiiM Pro which surprisingly made a nice difference.
Those suggesting a home demo are on point. The streamer market is moving rapidly and some believe the improvement is real but not significant with a 15% differential.

