I'm a school teacher/bag whore. I need a good bag to carry around everyday. It has to be something that I can fit papers into. I love my LV & Gucci too much to abuse them. That being said, I'm willing to buy a designer bag up to $500 (used or new) that would do the job. I know that I don't want a Coach bag. Any suggestions?? I want to get a bag before school starts.