Mexican rockers El Gran Silencio have a grand old time making mincemeat of the establishment. Offering an eclectic weave of thrash, polka, hip-hop, rock, vallenato and more, the young upstarts from Monterey rap, croon and holler their way through their major label debut, LIBRES Y LOCOS. Theirs is a gleeful sort of discord, displaying both a love for tradition and a strong propensity for smashing it to pieces. Think of the hybrid ferments of Ozomatli and Cafe Tacuba, the darkness of Cypress Hill and the boisterous clamor of Southern California punk, and you'll be on the right track. El Gran Silencio's stomping themes of love, loss and all that comes unhinged should inspire urban low-riders and chilango skate-punks alike.