I graduated from a full-time MBA program several years ago. Based on my experience, you should make your choice based on a few things:

1) Who else will be attending? You will get just as much if not more knowledge from other students (assuming they have solid work experience) than the professors. The professors tend to work in abstracts and not in the real world.

2) The alumni network should be connected to the market that your family business is in or have connections at companies that would be helpful to your family business. You should do some research into what companies you would like to have a warm entre to -- ask the school who in the alumni networks works or has worked for those companies.

3) Ranking of the school is important at investment banking, VC or large companies (image conscious)...other companies are looking for your skill set and experience fits to the position in question. Since you are going for a family business, you need to be clear about what areas of business you want to improve your skills on -- focus on the school reputation in those areas.

Babson has a very good reputation for entreprenuership, but you can always get the book published from the Babson staff.

I worked for a management consulting firm founded by a famous Harvard Business School professor. He spoke informally with our project group one day (about 10 of us) and this very question came up. His answer essentially echoed Bob's: the most important thing about business school is the contacts you make. Pick the school with the best name and best network. The advice from Team Chaos tells you how to evaluate that.

Go to Georgetown. They're tops for international business, and you'll find a lot of folks there to network with.