Maybe you should wait what the X-T10 might bring.
As a 'backup' body it will adapt all your lenses so you've got the same possibilities in case of emergency
I've got (next to my X-T1 and X-Pro1) an X100 which I use for citytrips etc. Very nice camera and something light to carry around. But when you get used to an X-T1, the X100 (especially the focus) becomes very very slow