Duplicate File Finder

I was making order among my 50000+ files in my home directory and realized that I had multiple copies of the same file in different directories. Therefore I was looking for some convenient way to find those duplicates and to delete them.
There are several applications that do something like this. However, none is perfect. E.g. mp3 files of the same song, but with a different id3 tag will be recognized by most programs as being different, whereas they might be essentially the same apart from the metadata in the id3 tag.