Businessweek published in its most recent issue an article, "B-Schools with a Niche," on MBA programs developing more highly focused, specialty degrees. Businessweek points out that it tends to be the second-tier schools that are pursuing this route in response to the application decline of the last three years.
If you can gain acceptance to a top-tier school that supports your specific goals, then your are probably better off aiming for that top- tier school. However, if you cannot get in, then a specialty program may be exactly what you need. See if the specialty program will get you where you want to go professionally. It could be an excellent option.