Julian, that's a very good point u raise re. fov . . . . and as i go for 100D and 82D fov eps for the dobs . . . . hmmm ...
Water Proof is important for me for (the dominant) terrestrial use.
Ed Zarenski the AA from CN rated the PCFs sharp 80-85% to the edge and no design flaws reducing actual aperture, but still only giving an actual fov of 4.0 - 4.3 deg. . . . hmmmm . . .
And in your blog you really enjoy the 6.5 fov of your XCFs compared to your old fov of 4.5. . . . .

. . .
real cause to reconsider.
also the Andrews High Grade (HG series) premium 10 x 50 binoculars look VERY similar to the Pentax XCF . . . . . .maybe a way of getting your fov in a WP case ???
more research is warranted . . 'cos i have the time atm