I agree. Go to UMN if you have it covered. There was a NYTimes article I read about graduate schools (it was about law schools) that really shed some light for me. Prestige is fine and dandy, but when you're going to have to foot that cost down the road in an uncertain economy, it can come back to your haunt you. I was admitted into Columbia and UPenn for graduate school and was totally psyched about it, because I limped into college with a 74 average and an 890 SAT Score. But I stepped my game up at Temple University and have been fortunate to win internships at leading institutions and then graduate working for a great company in KPMG.
Columbia and UPenn sounds nice and all, but UC-Berkeley offered me a full ride for the Health Policy program and I didn't even have to think about twice. Berkeley is an awesome school and though I know that the Ivy League schools get all the fanfare, do I really believe that UPenn and Columbia are worth 50,000 more a year than Cal? Heck no. I believe they both attract the same student population, kids who work hard. Simply, the University of Minnesota is a great school and if you're a ranking freak, you'll see there's a marginal difference between U of M and the other schools you have noted above. Free at #9 vs $100,000 at #3 ? I think the answer is simple. Enjoy the full ride!