I have previously decided on Penn, but have recently started to rethink after I had a closer look at a number of factors. Could anyone (especially current student and alumni) comment on which is better? I am interested in factors such as Quality of Corporate Program/ Career prospects/ Career services/ alumni networks/ Life style and any others factors that comes to mind.

I'd appreciate any candid comments.

I would say Penn for all the factors. Excellent corporate program, good career prospects (because of the economy it will be hard to find a job but rankings count a lot!) if you want to network New York is just 2 hours from Philly, while from Chicago you need a flight and Duke is a great school but also far away.