hey! well first of all: congratulations!
I am in the same position as you but for this coming year. And I am having the exact same dilemma. Although you have to admit it's a great dilemma to have.
I feel the same way as you. I wonder if Stanford would be a better experience for what I want to do (entrepreneurship) but then I wonder if I'd be stupid to pass up on Harvard because of its prestige. Plus Harvard is really trying hard in the entrepreneurship realm and is putting a lot of money into that area now.
Just in talking to people who don't know much about business schools, everyone is all about Harvard. In my family I have some very pro-Stanford and very pro-Harvard people. And I feel a bit pretentious and like a jerk for - not whining per se, but, you know, obsessing - over an opportunity I am very fortunate to have.
Im sure you're the same way in that you just dont want to make the wrong decision!