Curious if you found another viable alternative. Ive gone over to using Plex/Plexamp for music sync/cloud play and its been pretty okayish on the whole. Biggest issues are my server strength and internet connection

I really mainly use Spotify because of the combination of its library size and ease of availability / accessibility.

(Although John Zorn's catalogue remains an elusive beast)

I use LMS for my small, curated personal music library, which is great: https://github.com/epoupon/lms