In my opinion and from my personal experience we cannot study rock in Mexico without looking at EL TRI and his leader ALEX LORA (he was actually interviewed in the documentary). In the 16 years that I lived in Mexico they were by far the most famous rock band in Mexico, and the most original as well. Their fame has not change their music, they continue to be political, humble, and most importantly honest to rock.

check out some of their songs

http://www.youtube.com/watch?v=NlCwzq9CgGk

http://www.youtube.com/watch?v=Gz4RoswAcZk

( i know it doesn't look to good but i decided to use this video because i think it is really interesting that they are accompanied by and orchestra. They do this often.)