Backpacking around the world. Olympus OM-D

Project Revolife wrote:

Going to be backpacking the world for a couple years. This will be my first real investment in a system camera. I decided on the Olympus OM-D even though not my ultimate wants but more than fits my needs.

Currently I have the 12-50 which will be my weather sealed multi-purpose lens. 50 being the longest I plan on going.

Question is, which combo?

Panasonic 14/2.5 + Panasonic 25/1.4

Olympus 12/2 + Olympus 45/1.8

Olympus 9-18 + Olympus 45/1.8 or Panasonic 25/1.4

I'm leaning towards the first combo for the ultra compact and classic low light capable focal length.

Which combo above would you take with you?