I added an Acopian linear power supply ($140 on ebay) with a power supply board ($115) to my Bluesound Node 2i streamer ($430) and it sounds incredible for $685, total.
I’m not sure why I’d pay $2100 for the Lumin or $5700 for the Aries G2, but perhaps you have certain needs for higher rez outputs that I don’t have.
Some of the best audiophiles I know in my area (Denver/Front Range) use Raspberry Pi with linear power supplies. I like the interface and ease of the Bluesound, but wanted to upgrade the sound, and the advice of these folks was, basically, "spend good money on a DAC and make sure you have a linear powersupply for your streamer."