I've still been looking around, knowing that I still have a few months before getting another body.
How about the new
Fujifilm X-T100 using my Pentax lenses? (Initial price is $600 body only, $700 w/ 15-45 lens - Hopefully prices will come down a bit in a few months.)
The Fujifilm is small, about half the weight of a K3, uses APS-C, and has both an articulating touchscreen and an electronic viewfinder.
It isn't weather-resistant, nor does it have in-body image stabilization.
It does video better than Pentax, however, especially if I pay an extra $100 and get the 15-45 kit lens. It has bluetooth and pairs w/ my phone so I can apparently geotag images along with viewing them.
If I get the right Pentax K > Fujifilm X adapter, I am apparently able to use aperture mode shooting, so I could use any of my lenses in manual focus.
I see a few people on this forum are using the more expensive Fujifilm X-T20 or X-M1 with their Pentax lenses, so it seems doable...
Am I missing anything? Other advice? Thanks!