It would probably be much better if NuPrime put a comparison chart. Some of their offerings also have DACs and amps built in. So that's something that someone with an IDA-8 wouldn't need. The WR-1 for $100 more than the mini adds the capability to connect a local drive for your own files and of course is capable of higher resolutions vs. the 192Khz of the mini. The WR-1 also has wired ethernet so that if you don't have an ethernet jack, one could always get something like
https://www.amazon.com/dp/B084CZMYNM?psc=1&ref=ppx_yo2_dt_b_product_details Apparently the WR-1 only has SPDIF out (vs. USB) and I believe you can only get single rate DSD (via DoP) to the IDA-8 if you had a hard drive connected to the WR-1. The mini has a I2S output which will work with some of the NuPrime DAC offerings.
So it depends on what other hardware you have and your system goals. If it is just for streaming then you might have a different selection vs. someone who wants streaming and playback or just playback from a hard drive. For some, they may find it easier to buy a small fanless PC for around $150, give or take and a used computer monitor and a wireless keyboard and get by for a little less than something like the mini (but of course one has to deal with Windows and some don't want to do that). With that, an ethernet powerline adapter and hard drive could be added at a later date along with a program like JRiver.
There's a bunch of products like the Bluesound mentioned (or Sonos). Like everything else it depends on budget, preferences, and what one has in their system (audio and video wise). With DLNA, one can use various devlices, including some Blu-Ray players. While Oppo isn't made any longer, if I so wanted, my BDP-103Ds can do DLNA from music on my network to Tidal (
https://tidal.com/about/oppo). Some won't want video disc playback on a 2-channel system and won't want to connect a monitor. So decide on what features you want or will want in the near future and then make a list of what equipment is out there new and used that fits the bill.
