Growing up in San Diego I can tell you some great places to get some REAL Mexican food... not that fluffed up toursity crap. We always take a few people and make a side trip to a couple of local hole in the wall joints.... that's the best place to find those burritos the size of taxi cabs.
Gonzo - we'll have to grab you a Carne Asada while we're down there. I know you'll love it! We never miss it when we go down to visit the relatives.
