See my Hasselblad X1D wish list.
I will have the about $3995 Hasselblad XCD 30mm f/3.5 for testing on the Hasselblad X1D on Tuesday Feb 21, to be reviewed in the Medium Format section. This should give me just enough time to review it and do some more Hasselblad X1D work before the Fujifilm GFX system arrives.
The about $3995 Hasselblad XCD 30mm f/3.5 is equivalent to a 25.4mm f/2.87 as compared to a 35mm full frame camera (long dimension of frame). It is thus a solid wide angle choice—not super wide and not moderate, just right for many purposes.