Albertaco's - In Cypress, Lincoln and Valley View - These are my absolute favorite, but might be too far from you.
Los Alazanes - In Anaheim, Knott & Ball - In Anaheim, second favorite place, they put a tortilla under all the fries and toppings so you can eat the last bit as a burrito (if you are some how still hungry).
100% agree. I drive for work and have tried literally dozens of places but those two stand out the most. There is a second Albertaco's in Orange off of Glassell and Collins that has spicier salsas if that floats your boat.