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I ordered the A7rmII on Monday thru BH via PentaxForums link. BH gives no estimate on delivery date, but 2 days later i got a message saying it would be delivered on Friday. There's several customization options, and i'm only about 1/2 way thru figuring out where to assign options. The Fn button provides 12 options just by itself.
The EVF provides a very large view, supposedly the largest magnification now available on any FF. I believe it. Very easy to see things and subdued colors. Perhaps the pleasant effect of the EVF is partially due to the IBIS. There's none of the jerkiness that i've seen with other EVF, nicely stable.
I bought the cheapest FE zoom lens available, a used 28-70 kit lens from BH for $290, just to get started. In normal lighting, the AF seems quick. Haven't had the time to compare low light focusing with my K3 - But thats something i want to do - i sort of doubt that it can exceed the K3's low light AF but we'll see.