Another streamer that looks interesting is the Bricasti M5 - $2400 new.
There's a positive review
here, and the reviewer also provides a link to his review of the DCS Network Bridge. There are a number of Agon members that have posted their impressions of the M5 and the consensus appears positive.
The Bricasti M5 does not have any native streaming capabilities of music services (Tidal, Qobuz, Deezer, etc) - so you would still need a server running Roon or JRiver. No wifi in the M5, either.
To keep things simple, I was looking for a single box solution that had native internet streaming capabilities - without requiring a separate server.
In addition to the Lumin U1 Mini, the Sim Audio
Moon Mind 2 ($1900) was another streamer I was looking at closely. Not a lot of reviews on it, but I reached out to a few owners directly and all had high praise for it. Most of them had come from a Node 2i.
It has native streaming capabilities for all the popular streaming services - so no Roon required, but it is Roon-ready. No USB digital out, but it does have AES out. It has built-in wifi. 10 year warranty.
I'm extremely happy with the DCS Network Bridge. I think it will scale with any future DAC I can afford. Over at AudiophileStyle, there are many owners that use it with high-end dacs from Lampizator, DCS, Total-Dac, Berkley, etc.
The NB streams the major music services natively. Drawbacks? The app is just ok, no usb-out, no wifi - which weren't dealbreakers for me. You can attach a usb-drive to the DCS NB - which I use for the handful of higher-res files that own. I bought mine for $3100 used, and I have no regrets.
People might think spending almost 2-3x of your dac on a digital front end would be crazy. Maybe. But what I've learned over my digital journey is that the source matters - a lot. I think some people might be mistakenly upgrading from their already very good dacs, when there are significant sonic gains to be made from a source upgrade.