I'm lucky in that there's a Baja Fresh right next to the Chipotle in my area. I think the Chipotle sucks up all the yuppies which is why the Baja Fresh always has a relatively short line except later in the day.
If I was in the mood for authentic mexican food though, there's a lot of restaurants in my area where I can get a burrito that fills up the whole plate and gives you free chips for the same price as a Chipotle rice-roll. Those aren't good for everyday lunches cause you have to eat them with a fork and knife and it takes me a while so my most common source of "burritos" is Taco Bell.