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Regards the size thing ... if it doesn't fit in a bag or jacket pocket (neither an fuji xpro nor a dslr will) then what matters to most is how easy it is to carry rather than size. Buy a new strap?
If you buy fuji you'll need to budget a fair bit for lenses or set about adapting old ones.
There is something to be said for buying Nikon, Canon or Pentax when there are so many good mf lenses out there. A decent old macro on a aps-c body is killer for photographing printed matter (stationery, books etc) and cheap. You might want something that can shoot tethered.
I see.
Would suggest you have a look / hands on different compacts then - you can basically shoot all of these in manual modes, it is a different experience compared to a DSLR though (focusing etc.)