Thanks for chiming in…..on a scale of 1-10, where would you rate A15 vs A200. Given @rvpiano system, I suspect he is likely to hear appreciable differences between A15 vs A200.
I have gone through 5 different models of Aurender ($2300 -$24k) over last 10 years and all streamers (transport) from N150 to N30SA are built to very high standards. I recognize the subjective nature of our hobby, no two systems are alike and then there is room acoustics and end user listening skills. My experience lead me to conclude that the differences in streamers are subtle at best and degree of separation between streamers is greatly dependent on external DAC and rest of your system.
At OP’s price point of $2K - DAC, I believe A200 represents a great value and performance and alleviates him from the headaches of auditioning DAC’s for minimal gain, especially at his price point < $2500.
@rvpiano or anyone else is free to choose the best path as there so many different ways to accomplish a good sounding streaming setup without loosing your sanity :-)