<p>Wow, I was in almost the exact same situation for grad school with an additional school in the mix! If I were you, I would probably pick Penn or Stanford for undergrad. The undergrads I have met from Stanford are very happy and the campus is beautiful. There are also tons of resources not available at most places. I think Harvard would be good to, but I get the impression that the grad students are much happier than the undergrads. If you choose Wharton, I would do so because you like Penn and Philadelphia as a whole, not just what Wharton provides. Penn is so much more than Wharton and I think it’s really a shame people don’t see that.</p>