The biggest rumble in LA Opera’s West Side Story is not between the Sharks and the Jets but between two musical styles. Tony (Duke Kim), a Jet who wants out of the gang, and Maria (Gabriella Reyes), the sister of Shark’s leader, fall madly in love. Only hate could tear them apart, but there’s plenty of hate on the West Side. Kim has a great voice, and his version of “Maria” deservedly received a hearty applause, but unfortunately, his acting is a bit stodgy. In this West Side Story, Tony and Maria sound pitch-perfect, but the production itself doesn’t feel all that pretty.