Hi -- quick answer here. To be competitive within your famously high-performing demographic, you'll want a GMAT of around 750. To increase your competitive profile, we'd want to see your leadership: in the workplace, in university, if you lead a team on the website you run (commerce etc), and also we'd want to see long-standing community leadership, where you "share the wealth" of your professional and academic success with those in need. The admissions process for top MBA programs is a holistic one; the schools assess everything about you. So having super numbers is a good starting point, but be sure you understand all of the components that go into a successful b-school application, and make the most of ALL of them.

Good luck!
Margaret Strother