I have bought this camera since a few weeks. At the time being I own a 10-24 lens only but it looks very nice and sharp tool. As soon as I can sell my 100-400 for Canon I will upgrade with the same lens for Fuji.
I've bought an X-T2 with a 50-140mm f2 lens and a 2 times teleconverter. I'm having great fun with it and getting great results, superior to what I was getting with my Canon 5D MkIII and 70-300L.
With the Fuji, I did start out with the 100-400mm lens but ended up exchanging it - 100mm isn't quite wide enough for general purpose aircraft spotting with an APS-C sensor.