I'm using a Schiit Modius AKM 4493 chipped dac and it sounds great.. It cost $179.99 from Schiit B stock. I've been using it for two years. It has micro USB, coaxial, optical, and AES inputs, and both SE and balanced outputs. I also use an IFi Zen Dac Signature version one (USB input only - retail $249.99) which also has SE and balanced outputs. IMHO, it's another great sounding dac for the money. I also use a vintage (2008) Audio By Van Alstine Insight multibit dac with a Schiit EITR USB to S/PDIF converter and it sounds quite good with my Amazon Fire HD 10 tablet. I paid about $300 used (retail was $900 about $1200 in current U.S. dollars.)
For some reason, the AVA Insight dac will only work with the EITR with a micro USB HD 10 Amazon Fire. The Insight will not work with any of the USB-C Amazon Fire dacs that I use.