Not much use to you, and not a wedding tog, but I've just moved from Nikon D750 (before that 5D3) to XT1 and in a couple of days XT2.
In short it depends what you need and shoot - if you need really shallow depth of field - ie 1.2 or 1.4 then no crop is going to help you, if however you;re shooting anything 1.8 up and you'll be good.
Before the body I would take a look at the lenses and see if they're going to fit you needs - the body will from what I can tell, certainly the XT1 is very good, no telling what the XT2 will be like with the improved AF and larger pixel count (so improved cropping). So far the only thing I see really missing from their lineup is a true macro - the 60mm is a 2:1 which will probably be good enough for most people anyway, but given how good the EVF/LCD is converting a manual macro would probably yield as good if not better results.