I have 30,000+ songs in my music library. I've taken the time to meticulously tag each and every song when adding music to my library. I currently use MusicBee

I have 30,000+ songs in my music library. I've taken the time to meticulously tag each and every song when adding music to my library. I currently use MusicBee and love it. It's somewhat lightweight and its tagging tools are great. I've also used Media Monkey for a few years and that also has great tagging tools, but it's not as lightweight as MusicBee. I only ever use iTunes for purchasing songs I can't get via other channels such as b-sides or whatever.