I'm a pretty big fan of the X1D. I haven't touched a Mk II, but it certainly seems like a really nice refinement of the original concept. Some considerations:
1) Unlike some M lenses, I believe the Noctilux will not cover the entire frame of the X1D, so you'll have to crop. It should cover the square format, though. There are certainly people who have used various M lenses (including the Noctilux) quite successfully on the X1D.
2) You will be limited to the electronic shutter on the X1D, because unlike the SL2 it does not have a focal-plane shutter in the body. That means no flash, and you'll have to watch out for distortion from both camera motion and moving subjects (the "Lartigue effect"). It takes 0.3 seconds to read out the sensor, so even if you have a higher shutter speed set, you'll still have to be steady for that long. If you don't, your subject will look "stretched" in the direction of motion.
3) On the bright side, you'll be able to use all of your H-series lenses with the XH adapter. The shutters and apertures will work just as they do on the H6D, and if the firmware is recent enough some will autofocus.
The native X1D lenses are absolutely superb, by the way.
Nice to see you back! How have you been?
