Fresco is a fantastic alternative to Taco Bell. Their food is fresher and tastier, their prices are cheaper, and their lines are shorter. Plus, they deliver!
Fresco also has a lot of vegetarian options--anything can be made with pinto beans or black beans instead of meat, and they're easy to deal with when you request changes to the order. Their delivery isn't the fastest in the world, but we usually get extra chips and salsa or something. The quacamole is really good, and I also recommend the pinto bean tacos.