"I must also note that the BDA-3.14 is very quiet." -- All of Bryston's gear is this way. Dead silence from everyone of their components. It seems that this is rarely mentioned, but they have outstandingly "dead quiet" components.
Used to use MP3Tag, but switched over to "Tagscanner", and found it just a far, far better tool. Of course switched to Windows as well to use it and other programs for my audio/video library needs. (there are just so many more programs to be had) If anyone is interested and on the PC, (there may be a MAC version, I don't know) but it is well worth checking out. You won't go back to MP3Tag as it is too limiting. But as they say "to each their own".