Recommendations for handheld documentary/social/street/photojournalism? + OM-D E-M5 or GH3

Visualartivist wrote:

I anticipate there will be many occasions when I will take my camera and leave the tripod behind to keep my pack light. So handheld video quality is important

About the location, it will be very green in some places. The part of Ecuador I'll be staying is in between the Andes Mountains and the Amazon Rainforest. So I will be doing plenty of landscape, plants, wildlife photography as well, but long-term that's not the subject I'm most interested in. Anyway, I imagine the setting will be quite green most of the time, and not much concrete. I didn't think that would demand for a better codec.

In terms of the Olympus PEN cameras, I'm also concerned with the amount of physical controls you get. It just looks very basic, but perhaps there is more control there than meets the eye. I'll have to read up on it.