I see many are jumping ship to Fuji X system. As I'm at a point where I need to upgrade my GF1 anyway (to either GX7 of EM-1 or 5), that naturally gives me a chance to consider whether I also should join the exodus, either to Fuji or Sony. I shoot mostly children's candid photos: my kids (under 10) are small, so I get by even with GF1's slow AF when they are indoor. When they play sports, I bring my Nikon to nail AF. About 10% of my photos are landscape that I happen to take when my family travels on vacation. I was thinking of updating to GX7, which I thought checked all the boxes. But when EM-1 came out, that has become a serious contender, since it can replace my Nikon as well for kids' sports photography. For the kind of photography that I pursue, should I stay with MFT? Is there huge benefit to be had with either Fuji or Sony that I can't get with GX7 or EM-1?