Maybe not the best fit in this this thread but I couldn't find a better one.
For years I used Apple Airport Express or Apple TV to stream music to music to existing stereo systems. Over the years the Airport Express's have lost support from Apple and the new Apple TV requires optic out so I've used some cheap DACs to switch optic to RCA.
I tried a cheap (Eskin?) blue tooth receiver but the sound quality was crap.
Finally broke down and bought the AudioEngine B1 - bluetooth receiver (with built in DAC).
Sound quality is great. It's not cheap but it sure makes life easy to stream from any of my devices holding all my music to my legacy stereo systems.
Recommended.
B1 Bluetooth Music Receiver — Audioengine