Just checking if anyone who uses a Nikon D700, also use the OMD em5? Or even compared to the fuji x-pro? Are you happy with the oly performance in terms of AF, Noise and outright performance? How does it compare at ISO 6400 or 12800? (some websites say its better some say it's worse so I'm confused! ) How does the AF speed compare? How well does it work shooting kids running around? Thanks a million for your help.