Fat Bastard Burrito, I LOVE YOU! I usually get a naked burrito with all the fixings (+ guacamole is free!!!!) Great value for your money ($6.99 for a "lil" size). Don't be fooled though, it certainly isn't lil! You always leave feeling like you've gained five pounds (or so.)
I have always LOVED Chipotle's Burrito Bowls, but Fat Bastard Burrito is a great alternative. It's cheaper and has a lot of great toppings too. Try it out :)