Which place serves the best? I usually go to Chipotle and get the chicken burrito with everything plus guacamole. I've also frequently been to the Mexi-Cali cart on UPENN's campus, but it seems that the quality's gone down lately. I've heard El Fuego on 7th and Walnut is good, but I've never tried it (I guess they are also opening another location that is going to serve beer and margaritas). Any suggestions?