I would choose Colorado. Not only is it an excellent program, it's an awesome state to be in and gives you a different experience than living in CA. Colorado also has the ACTS program for your final year so you get to choose a participating clinic in Colorado to work on patients in a real life work setting, WITHOUT having to pay for expenses besides you meals (at least from what I heard). The school has new facilities, and gives back to student veterans by offering free dental work without having them pay a single penny. How awesome is that?! USC is an amazing school, but the cost of it is just too overwhelming. Don't know much about Loma Linda, so I can't give much insight on that school. Good luck with your decision!