Roon is possibly the best all round, espically for library management and play. But it does require a license:
I mainly use HiFi (MPD + YMPD). Lightweight web music player:
https://dietpi.com/forum/t/dietpi-software-details-for-all-installation-options/22/1
SubSonic is also fine, Ampache doesn’t install MPD at the moment, so its streaming only to client system.
As for bluetooth speaker. I’ll need to get one ordered and see whats involved in pairing it with RPi 3.