I second the Wiim. I had just added the Pro, which doesn’t have a DAC or do above CD quality, to my basement HT system, which previously was reserved for video and SACD/Blu Rays, but I had a knee replacement 5 weeks ago and was using the bedroom down there for ergonomic reasons and I wanted to be able to stream from Apple and my NAS without having to deal with Physical Media. For $100 this was an unbelievable audio value and the app is fun.
Btw I also admire your charitable impulses and I don’t devalue the way that you listen to music. You care more about sound reproduction than 99% of the rest of the world and and have achieved good results economically. However I am turned off by the self righteousness . We all have just a brief amount of time to enjoy our stay here before we turn back into a few grams of carbon. I always believed that the truly altruistic don’t have to spend their time obsessed with self congratulation and virtue posing