summerofsomething

Hello good people. I'm looking for feedback as I dive into grad school research and applications--still early in the process so bear with me. I work in business development for a media company, and my undergrad is in journalism from a private arts school. I could ultimately see myself running a large non-profit organization like Ford Foundation, NPR, Planned Parenthood etc, or possibly programs within the UN (aim high, right?). I have substantial volunteer experience on top of the media/arts background and participated in a Fulbright summer program (I've been out of school for a few years). I've looked into the backgrounds of people running these types of organizations and many seem to have law as their advanced degree. I don't think that's right for me, so I'm considering an MBA (social entrepreneurship focus) or MPA. Pending a good quant score on my GMAT/GRE, I have a 3.6 GPA so I'd like to apply to top schools like everyone else. Anyone with experience in these programs or similar goals who can weigh in? All opinions welcome. Thanks in advance!