(no subject)

I've decided to clean up my music collection. I know I have multiple copies of a lot of stuff, some of which are ripped from scratched cds. I want a program that will find duplicates, and delete the dupes with skips, glitches, or lower quality. I found a few promising programs - do any of you have experience with these, or another program that you'd recommend instead?

MP3Test
MP3 Analyzer in Helium Music Manager
ENCSpot MP3 Analyzer
MP3 Tag Studio