I'm heading to CA for Christmas and would like some recommendations for Mexican joints that have great food and stellar margaritas -- places that are a manageable drive from LAX. I made a reservation at Petty Cash, but am rethinking based on reviews I see here. I like all fresh ingredients and my idea of a great margarita is something close to the celery-serrano margarita served at Jade Bar in Scottsdale, AZ. Would El Carmen be a good choice? Other suggestions?