Taking in the comments above my addition would be to opt for something with a longer zoom lens as personally I feel x4 is a bit restricting (35m/m equivalent 28 to 112mm focal length). I have found that my Fuji with a x10 zoom has allowed better access to wild life and more modern cameras have even longer zoom lenses with little or no additional weight. Nice looking camera though, reminds me of the Leica from the early 70's.
The problem with having a longer lens and keeping the camera the same size is you have to make the sensor smaller which leads to lower quality images. It just depends how critical you are about image quality whether this is a compromise that you are happy with. As with most of these things there is no one right answer.