Hi Marcin, I have an X-E2 and just love it with the new firmware 4.0. It now has 'eye detection', before the firmware update it had just the face detection, as you do portraits this may be a bonus over the Pro1. If the body is too small you could try an accessory grip.
As far as the viewfinder goes, you might never want to look through a dslr viewfinder prism ever again! I play around in manual in low light, it is great fun, you really can almost see in the dark, the EVF is utterly wonderful for WYSIWYG creativity.
When I was researching to buy, a couple of years ago, I read on forums that Fuji UK sell refurbished stock, the consensus was that this is a great way to go (if you go to Fuji UK you can read the details). My body (came with the 18-55), and later the 14mm and 35mm are refurbished by Fuji, I can only recommend this to you if can manage to buy from them.
Hope that helps, Chig.