Can't claim to be an expert. But I love to shoot wide, for what reason I am not sure, and I do live in Europe. That said, at the moment, the only x-series camera I am using is the X100. But just as a comparison, when I shoot full frame I use 24mm at the widest end, and often feel I need more.
I know that doesn't answer your question, but I thought I throw that in if it helps sway you in any way.