As to the Irish Tenors, I've got the video of the "first" three, and a cd by the "second" three, and a video of the original "Tenors". I could not agree more as to them clearly demonstrating the voice as an instrument. In contrast to the "operatic" selections of Pavarotti, et alia, the "Irish Tenor" programs included selections from both the classic and folk repertoires. It was amazing to hear what a great voice and full orchestra can do with a "simple" folk song.