I can't help you with the academic decision, but I just want to point out that you will be perfectly safe (crime-wise) no matter what grad school you attend. While of course idyllic suburban college campuses are safer than urban campuses, in reality you are so extraordinarily unlikely to be a victim of a crime at any school that it's not even worth considering.
Any urban environment will come with the occasional crazy panhandler or stolen bike, but given an ounce of street smarts you do not have to worry about much. You'll effectively never be in neighborhoods where there is a real threat of violence. College campuses aren't gang territory - Hyde Park is full of Starbucks and organic grocery stores.