If you want uber-prestige and instant international recognition, then Harvard it is.
If living in the Big Apple is important to you and you want top-notch NYC connections, then Columbia or NYU.
If you want a small student body and daily interaction with Posner, then Chicago.
If you want to decrease the amount you take out in loans and you think you can benefit from Wharton, then Penn.
All the schools you mention offer a great legal education. I think it comes down to pure personal choice.