I've found PlexMediaServer to be great with the ripped DVD/BD collection, but MP3s - naming them consistently is a dark art.
I've had limited success renaming the MP3 collection with MusicBrainzPicard - in that sometimes it works, sometimes it partially works (losing MP3s in the process) and most times it doesn't work at all - doesn't actually save the renamed MP3s to the new location.
So, if anyone can recommend something that will go through MP3s ripped at various times using different software/naming conventions, identify them and rename them properly to work with Plex Media Server, I'd be eternally grateful.