Ron, Steve and hiepphotog,
Thank you very much for your swift replies.
Firs things first. I have considered getting an A7 to compliment the RX1, but at the time when I bought my second RX1, the thought of it was that I was getting a back up to the first RX1 because I work and I depend on it. When I had my NEX-7, I had a 5n as a back up. If I would have gotten an A7, it would have been with the 55mm to get that FOV. I couldn't have afforded an A7+55+35/2.8 at the time so it had to be either a back up, or another system completely.
Now I would be able to consider investing again, this time, though, I have spent enough time with the RX1 to know that AF could be better and MF, while good, is still a bit of a hindrance with fast reaction moments (of which, I am not chasing much, mind you. I am not the reactive clicky type)
My interest wouldn't have swayed this way unless I heard of the modification to the filter stack on the A7r and that's what attracts me. So, my main curiosity is the ZM vs the ZE and see how they stack up performance wise. I'd love to have the one closest to the RX1 in rendering and sharpness. To me, the RX1 lens is really the best 35mm and, unlike Ron who has seen many 35s -I'm sure-, I've used some (2/35mm ZE, 35mm 1.4 L, 35mm G Contax, 2/35mm ZM, 35mm 2.8 C/Y and 24mm 1.8 E)
I have heard of the new Ultron coming up. That sounds like a nice lens but nothing other than film tests as you have noticed, Ron. My inclination is to go for an A7r modded and the ZM but I have yet to see full resolution samples. While I've seen Jack's photographs here, I would still need to see full resolution images to get an accurate idea of that cam+lens combo. If the A7r+ZM gets to be similar to Leica+ZM, I just might be sold.
After that, it's just matter of hoping Sony gives us back the lossless compression.