The Carter Family have my vote. The way Sara and Maybelle weave their voices together. If you listen to them enough you begin to hear different little patterns in each and every song. Then I love the later recordings done by Mother Maybelle and her daughters. The way they stack their voices together, Anita's golden voice at the top of it all, Maybelle taking in the low end. That is pure heaven to me. I also particularly like Jim and Jesse McReynolds. They recorded a song not too long ago, the old Hank Williams song "Faded Love and Winter Roses", with Emmylou Harris that is just pure beauty. John J.