For beginners (0-1 year dance experience)
I would prefer to choose simple, rhytmical, energetical and instrumental music with a medium tempo (65 bpm for tangos; 90 bpm for milongas and 65/70 bpm for valses). In terms of tango orchestras this would mean:
Alfredo De Angelis, Juan D’Arienzo, Miguel Calo, Pedro Laurenz, Lucio Demare, Francisco Canaro, Angel D’Agostino (with Angel Vargas) and Carlos Di Sarli (period from 1942 and later).
For intermediate dancers (1-4 years dance experience)
I am thinking of the slightly more complex and lyrical and maybe a bit melancholy music, of all tempi. In terms of orchestras this would mean that you can also use orchestras such as Ricardo Tanturi, Anibal Troilo, Rodolfo Biagi, Jose Garcia, Edgardo Donato, Roberto Firpo,Osvaldo Fresedo, Francisco Lomuto, Ricardo Malerba and Manuel Buzon.
For advanced dancers (> 4 years dance experience)
page 53 of «The El Corte Tango DJ Manual», Mayday DJ 2010