D800 interface is fine. It's the viewfinder I want from Nikon's film days. A good screen and .76 at least. I'm tired of the cheap seats with .7 magnification and plastic screens. I don't want a 1ds3/D4 style behemoth or a kludge mfd behemoth. I don't want a freeze framed stuttering EVF. The old style VF is all the retro I need.
T I think you want something nobody is going to make. Probably your m9 is the last one.
The EVF's are getting better, Pansonics evf is great, though not as detailed, everyone else seems to jump around a little.
Really I'm beyond hoping for a step back because I find all ovf's suck, even the biggest which is the H system because it bends the view.
I drone on about it, but the interface of the gh3 is tremendous. On my right hand I can set wb, +- corrections, focus points, iso, shutter and f stop, (which at micro 43 should just be set at wide open al the time.)
and never take my eye off the finder all with buttons that are labeled wb, +-, and iso.
Pretty cool, very fast, I can manually focus, though don't need to because the focus points cover every segment of the screen, the face detection is freaky good, the track focus also very good.
Still, I like pretty stuff, wish olympus would up the file quality, especially in video, do a little better high iso without going painterly and stick with the omd 5 look as that camera feels better built than my m8 and is a lot more usable.
But if I was a walk through the fields guy or a street photographer I'd do the Olympus way before I'd buy the fm digital because it shoots pretty much the same file, the Olympus I think is even a little prettier in tone and color than nikon color for skin tones and the oly is small enough to carry around and the lenses are dead sharp and cheap.
Even that panasonic shown here has a 200 to 600mm 35mm equivalent lens, the Olympus with the 25mm lecia 1.4 is a 50mm equivalent and freaky good.

IMO
BC