I've debated MBA vs no MBA and for now continue to decide no. For I-Bankers and the like I completely agree that the school matters. Especially at the beginning. That being said, I've always been told that for any other type of job the school (and grades) only matter for your first few years. After that it's just a foot note to the work experience you've aquired since graduating.
eta: TP - If you get job and expect to stay in the area, UCSD finally opened a business school.
http://management.ucsd.edu/ It's still relatively new but they fully expect for it to be a top school one day.