i had a NEX F3, NEX 6 and now got a Fuji XE1. (had nikon, and fuji s5 pro in the past)
while NEX series is smaller, i found Fuji to be abit more.....serious.
Funny i got the XE1 since it was launched and i still dont have a single fuji lens. it has always been about bring myself back to the basic no AF, no fancy features, just take it slow and re-learn everything. so i always use my old nikon lens and leica lens. to be honest, in the original X pro 1 promo video, thats how they pitch it, they want to user to take it slow and think twice before pressing the button. but unfortunately a lot of people start comparing the fuji range to other high speed camera system. that's something to consider if you plan to get into the fuji system.
my eyes are quite bad so i actually prefer evf as opposed to ovf. thats part fo the reason why i went with xe1 rather than x-pro 1.
x-pro 1 is quite massive, so it's worth playing around with it in the shop before buying it.
(new fuji camera is just round the corner, i beleive third week of oct, so might worth wait and see what they have on offer. alteratively, NEX full frame is also due before xmas, so keep an eye on that too)