As a dual system shooter I could move totally from my Nikon D4/D810 /D750 with the addition of the fast 200mm. I use a Nikon 300 2.8 at least three times a week. The lens is big and heavy but others competing for the concerts I shoot for a living all use similar gear. It might not be smaller but the files would sure require less pp. Fuji, Put me down for one.