Gang -
I currently use Abee MP3 duplicate checker. It totally rocks. It only looks at Artist & Title tag and then compares by bitrate/length. So simple, it's sinful.
http://abeetech.com/mp3-duplicates-finder/
Since all my MP3s are VBR and used same v-0 to encode, it was easy to remove duplicates.
Does such a beast exists for FLAC files? All of my FLAC are at 1.1.4
Thanks gang!