Originally posted by JPT Another option in APS-C is Canon M. I know this doesn't get recommended much to enthusiast users, but that is mainly because of the limited range of native lenses. If you're adapting old lenses, you just need to make sure that the adapters are available.
There are a few generations of bodies, both with EVF and without, and they are designed for simplicity. I always feel the ergonomics of the M cameras are great (that is the M6, M3 or M2 bodies).
I've owned an original EOS M and an M5. Both were very innovative and ergonomic. I gave away the M a few years ago, and really liked the M5 for its size, flexibility, and the ability to use adapters on it.
Unlike the original poster, I realized what I really wanted was to expand my 645Z setup - going in totally the opposite direction.
So the Canon M5 and lenses got traded in toward a beast of a lens - HD Pentax-DA645 1:45 28-45 ED AW SR - and its spectacular.
I played with the Fujis and Sonys and found the ergonomics weird, and the user interface clunky. The Canon M5 was more natural. It seems like Pentax, Canon and Nikon design for photographers; the Sony not so much.
Anyway, a used M5/M6 might be a worthwhile option. Was a great travel camera. My GRIII replaced it.