IMHO, any of the current mirrorless lens interchangeable camera is good enough for me. The reason I chose NEX 5N 2.5 years ago was because of my range of in-expensive SLR lenses which I was using on my Canon 5D. They are a mixture of Nikon ais, Voightlander ais, Pentax K and M lenses, good to have but not good to sell cause I will lose a lot of money. I bought into Sony simply because Sony had the best manual focus assist tools at that point in time, far far superior to what I was using in the Canon 5D. Today, if I feel justifiable, in my own context, I will buy the EM-1, because I like the looks of this little dynamite, the recently announced Fuji XE-2 basically to replace my APS-C 5N because it has better manual focus assist, plus, the Sony A7r, for maximum IQ and resolution for a few of my pretty good but in-expensive lenses. Wow, best in class from m43 to FF, why not. If I live long enough, I guarantee you that I will continue to appreciate the excellent technological advances we are making in the world of digital photography. Those of you in your 20s-50s must be thankful that you live in this era. I am approaching 70 and am hoping that I can have another 10 years of healthy life to enjoy the recent advances in technology. Just go ahead, do your maths and research, buy, but make sure you use them to the fullest, not because you think the new acquirement can make you a better photographer. In the first place, if you are not a good photographer, I don't think you will know the difference, m43 or FF.