Hi Mr Lavorgna, Hi everyone,
This is a superb discussion and quite timely for me, as I'm in the market to upgrade my media player software.
Since it seems like all of the products emphasize bit-accurate music reproduction, one way to differentiate these products might be based on how accurately and easily they can fix problems with meta-data.
In my case, I ripped my largish collection of CDs using Exact Audio Copy to .flac files. In most cases the meta-data was captured correctly. In some cases, however, it wasn't. I'm not thrilled about fixing all of these albums manually, even with tools such as Musicbranz Picard. The most compelling product, to me at least, would be the one that offers excellent musical reproduction [and it seems like they all do] as well as options for high quality and complete metadata lookup and repair.
My two cents worth, thank you, best regards, J