>>3052362a7 series.
a7 itself can be found for under/around $700. a7ii has IBIS, better af, and pdaf adapter support and is closer to $1400. a7rii is probably the best sensor on the market but is a lot more expensive at $2,400.
The other advantage to the a7 series is that your MD lenses will be the same equivalent focal length as your X-700 when used. None of that crop nonsense. That is the whole reason I got one. The larger body also makes the large MD lenses less awkward than they would be on a crop body (though to be fair, most Fuji crop bodies are as large if not bigger than the a7)
Plus modern bodies can autofocus the MD lenses with the Techart Pro (pictured).
>- good viewfinder (are EVF good? focus range meter on viewfinder would be sweet)Best on the market. Focus peaking and manual focus assist make it easy as hell to manually focus a lens through an EVF. You want to avoid the hybrid evf/ove viewfinders, they are a fucking mess.
>- good controls - ideally dedicated iso, shutter speed and exposure compensation knobs on body or a decent way to change it all w/o going through the menus. something that is full manual friendly and not just toy for people shooting auto. 3 control wheels (plus dedicated exposure wheel), almost every button re-programmable, and a re-programmable quick access mini menu for less often changed settings.
>- not shit kit lensThe FF e-mount kit lens is one of the better kit lenses ever made.
>- other lenses with reasonable prices (so i guess fuji is out?)You get similar pricing to Fuji, but the lenses are FF and have a lot better IQ. Sony has also been releasing some affordable primes lately (see SEL50F18F [though this lens has AF issues], and SEL85F18).