[JJ_SO]

If you can accept the lower resolution, I recommend the Sony A7s with dedicated sony lenses for accurate low light AF. The A7s + 55mm 1.8 Zony make a very satisfying combination. Alternatively the A7rii probably has lower AF sensitivity (and less sensitive EVF) due to partial sensor read out in live view but will enable PDAF with DSLR lenses. However the A7s can probably be had for about $1500 used versus $3000+ for the a7rii. Since I got my A7s I am convinced to totally transition away from DSLR cameras as for my style of shooting (portraiture, street, low light) DSLRs are simply obsolete technology ( in the sense that there is a better solution now available).

 

More than once I was playing with this idea, Ayoh. I just think, I'll wait for one or two iterations and meanwhile borrow an A7RII to make my own practical view. I read too much about quirky interface, but I know, the longer I wait, the less money I get for my DSLR gear.

 

There's a bit uncertainty about the differences of A7II, A7SII and A7RII - except the "high ISO" and "high resolution" as main feature I really don't get the point, how the additional character in the name is worth double the price of a A7II. 

 

Poor battery performance, knowledge of a 4 million dots resolving EVF (in a Leica) make me hesitate. Also, I don't think, Nikon will not answer sooner or later the Sony threat although it's probably a different mount on a Nikon FF mirrorless.

 

Meanwhile I'll make my first mirrorless system steps with a little Fuji and two lenses as I always wanted to have something much lighter than DSLR but at comparable Quality level.