I suggest comparing programs. I know this seems harsh, but review what kind of funding they are offering. Will you survive with those funds? Remember you are going to be there for a few years. Look at the requirements. See if the department gives you an option to specialize in something (gender studies, brazilian lit). Look carefully at the profs. Are there any you would like to work with? Read their articles or books to get a better sense of their interests and knowledge. I would also look at the department as a whole. Is it diverse? Sometimes we get caught up in the department's ranking without seeing all the other factors that could enrich our experience at that institution. Good luck!