I bought the Gustard A26 a couple weeks ago for one of my headphone setups. I wanted to see what all the hype is about....
For wifi I have good results with this basic bridge:
https://www.amazon.com/gp/product/B01N5RCZQH/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Anyway I thought it sounded very good and well built. Very punchy and good width of sound stage. Then I swapped for one of my Denafrips R2R DACs and realized I need to return the A26. R2R is so much more organic sounding and much better soundstage.
I'll give the R26 a try instead to see how it compares.
But Gustard did a good job with these. I like the style of the A26 better than the R26. Good value for what you pay for them.
System matching is important but if you really want to compare the sound quality of DACs try listening to them thru a good headphone amp. It gives you a lot more detail that can be lost in room acoustics with speakers.