Midwest Middle Market or Goldman Sachs/BTG Pactual/Other top firms Brazillian Office?

I am a long time lurker here, but usually never post.

Some background...

Came to the United States for college. I did some finance, and other, internships here, had a lot of extracurricular leadership.

Initially I wanted to live here for the long term. Start in banking, move into PE, go to MBA for the network, and then back into PE onto the partner track. Maybe I could one become an entrepreneur or something else, but so far the track was Banking>PE>MBA>PE.

Currently...

My main goal right now is to be able to get into a top MBA program (HSW) and I am trying to decide the best path to get there.

My Dilemma...

Outside of work, I think Brazil is a wonderful country, the only things I don't like there are the corruption, bad attitude towards work (too much playing and not much hard work as compared to the U.S., which means that I would probably learn less), and inequality. However, I believe I prefer the U.S. because it is a more developed country and the overall quality of life is better.

So WSO, should I pursue a MM Midwest career in the US or work for a top firm in Brazil?