As you start looking at things like jriver, etc... you should at least play with plex and roon.
Plex is great for all around media, excels at video, but audio is catching up.
For the ultimate music experience, I like roon the best. Maximizes audio quality, can manage playback across multiple endpoints (like plex), and has a great ui for discovery, playback, etc...
Both plex and roon will handle all of the metadata collection, correction, etc - will download cover art, liner notes, reviews, etc, and will play custom 'radio' based on your collection, genre, mood etc.
My setup has a synology nas to store media (movies, music, photos) - I'm up to 52tb now, but I also have about 350 movies and a lot of them are 4k - music is 'only' 6tb right now, and a PC to host the roon and plex servers. I can playback media to streamers (shield, ATV, firetv) or dedicated music endpoints built with raspberry pi and hifi dacs.
Fantastic quality, simple to use. I even have the server setup so sticking a disc in the drive auto-rips the content and stores it on the nas.
The great thing about a media server like roon and plex is, as you add drives it will continue to organize your content, and present a simple navigation, no matter how many places you out content.
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