I was following a bit the crowd (many won't admit it) and jumped in the XT-1 story. Sold some gear, got the XT-1 and some lenses, good lenses. I'm happy that I sold the whole system today.
Don't get me wrong, it is a very good camera, very capable but at the end, I was utterly sad shooting with it. That's the word, sad. Nothing to compare against pro Nikon body like D700 or 8xx.
I sold my D700 some times ago to a friend and this friend knew my sadness with my brand new fragile hype system. This very friend offered me my D700 for Christmas and it was just emotional
Yes, I do better photos with my Nikon gear than with any other gear because I feel comfortable. My Nikon is my tool, I can put it on rocks while climbing a cliff, I can put it on the floor while pissing in the forest, even under the rain, and yet, I feel comfortable. I was enable to do that with the XT-1.
So for me, the XT-1 and fuji lens system, even if LuLa praise it, isn't a comfortable system to shoot at all compared to Nikon High DSLR. It is just a condensate of technology in a very tiny and unergonomic body (compared again to the D700 or the D810 that I rent some times).
Fuji lenses are flawless but was a dust magnet, the worst I ever seen. You know what I'm speaking about, those tiny white spot on the lens barrel, those long minutes of cleaning with the brush of the lens pen :p
With Nikon : come back from outdoor >> quick inspection >> stored till next expedition.
Speaking about IQ ... herr ... what the hell is IQ ?? I do quality pictures with whatever gear I feel comfortable shooting with. This is as subjective as the bokeh.