a couple things. first, i have the olly evf which is similar in design to the gxr's. while it looks stupid, the fact that it articulates is a huge plus for street photographers, as in 'periscope' mode, folks do not know what youre doing with the camera. plus, unlike any other mirrorless, the gxr is actually optimized for M lenses. i think this is a much better option than the xpro1, and i am a huge fuji fan, who loves his x100! it just seems the design of the xpro is not compatible with proper use of RF lenses, and in addition to being not properly compatible, its also damned expensive. it does not seem fuji gave the least consideration to using this camera with legacy lenses or using it in any but an autofocus capacity. i'm not bashing fuji, thats their business choice. all i'm saying is that is the reality, so its best to deal with that and not our 'fantasy' about what it 'should' be or how very 'pretty' it is, etc etc etc.
also, though i am not a sony fan, i have both read and seen that M lenses seem to perform better on the 5n (with vf) than on the 7, so you might want to consider that as well. finally, though i know it is sacrilige to suggest, i would personally recommend the olly om-d. as ive said, my paltry M and M39 collection fairly kick it on my ep2, and by all accounts the om-d is eons better in terms of general IQ parameters and low light/high iso up to 6400. my personal bet is in terms of IQ with RF lenses, the om-d will exceed both the xpro1 and nex7, and will be at least the equal to the 5n and gxr at all iso's. and i put my money on it, as i have a chrome kit on order!