These albums disappeared off the face of iTunes back in April when "everything" was iTunes Plus. In the past couple of hours, they have both reappeared. I'm guessing this happened with many other albums, but these were two that I had been eyeing an upgrade on. I'm probably a sucker anyway for these upgrades. There isn't some noticable mono to stereo or stereo to dolby digital difference in my car or headphones. I honestly can't get the sound of DTS audio CDs that I had a few years ago. If you've heard DTS audio in movies, imagine entire albums in this. Awesome.