After agonizing myself, I got the 27mm. The price + size/weight is just so much better. I don't mind having it on my neck all day, couldn't feel it. A small sacrifice for the willingness to always carry it around.
This review was the one that really sold me: http://www.flixelpix.com/gear/fujifilm-27mm-review/
I have a 27mm for street, a 18-135 for hikes and travelling, might add a 90mm and the 14mm someday but its pretty far off