Travleling, seeing the world, making images.
After much deliberation I've decided that I'm gonna make the fuji work for stills and use a GH4 for video. The logic is that the GH4 will make a versatile, compact camera that I can grow with. All my Nikon glass will work great on the GH4. I see how I could have replaced everything with a Sony A7RII but that would mean much much bulkier lenses to cover the long end and poor battery life. Being light means I can get a lighter tripod as well. Trying to factor in my back!
16mp from the Fuji will limit how much I can crop but other than that I'm extremely pleased with the image quality and the compact nature of the body and lenses means I can easily pack the GH4 and the Fuji into one kit. Kind of nice to have video and stills capture on separate cards.
It's not a clear cut answer and my preference for x-t1 is not based on technical image quality alone. The D600 when paired with sharp lens and focused properly will ultimately deliver images with higher resolution, more dynamic range, better high ISO, etc... It has a more capable and advanced focusing system as well..
However, i just find that the X-T1 is an easier camera to work with for the way I shoot. The lenses are all very sharp and have a very consistent look from one to another. This is huge. You need really good Nikon/Zeiss glass to match the Fuji's lenses. Also the colors from the Fuji are great, not that the Nikon's are bad, but the Fuji just seems to excel in this area. I think there might be less dynamic range and there for the RAW files look a little punchier out of camera. The Nikon files definitely have more latitude and more recoverability in post.
The EVF allows me to easily punch in and make sure the focus is perfect with out removing my eye from the viewfinder. I use manual focus a lot and it works great this way.
The battery on the Nikon lasts way longer too.
The nikon will appeal to you if you want a camera that does what a FF DSLR is supposed to do - hi res RAW files with lots of information, a lens mount that has been standard for over 50 years, more control over DOF, long battery life, optical viewfinder, etc...
The X-T1 is a different shooting experience. Coming from rangefinders, I find the X-T1 gives me the small form factor, simple manual controls and sharp optics I'm used to while being a much more flexible and useful camera than a Leica.
yeah, i meant the rx10ii, not rx100. it seems like a really well featured camera.