This week's tanda is a classic set by Anibal Troilo with Francisco Fiorentino singing. You don't get much more tango than this. Troilo and Fiorentino created some of the greatest tango music of all time. In these songs, Troilo is at the top of his game with some of the best musicians around, including Orlando Goñi on piano and Astor Piazzolla, along with Troilo, on bandoneon.
Translation of Gricel: http://poesiadegotan.com/2012/12/17/gricel-1937/
Translation of Barrio de Tango: http://letrasdetango.wordpress.com/2011/12/30/barrio-de-tango/