Chipotle for me. It's rather everywhere, could be made slightly healthy if you omit the dairy items and guac and do bowls and salads instead of burritos. Yeah, they had their struggles with food poisoning lol, but they're on the right track now.
I don't really do burger chains anymore. If want a nice burger I'd rather make it a special occasion. Plus I'm trying to eat less red meat due to the Gaia, Mother Earth.