Te aconsejo que me olvides by Aníbal Troilo y Francisco Fiorentino. Beautiful, rhythmic, and flowing. A great example of dynamics to strong music.
Que Falta Que Me Haces by Miguel Calo & Alberto Podestá. A great musical resume with simple movements but complex interpretation.
Mi Dolor by Juan D’Arienzo. Pay special attention to the unique interpretation of the bandoneon solos.