I hope you like the camera. I find the Zeiss Ikon to be a very usable camera and one that took just a few minutes for controls to be intuitive.
The one control that occasionally trips me up is the shutter release lock.
Otherwise, it's a fine piece of gear.
I have a Luigi case. At the time, the Zeiss Ikon case wasn't available. A case makes the camera a bit quieter, because it muffles the sound.
I have a two-lens set: 50mm Planar and 25mm Biogon. The only lenses I would like to add are the 21mm Biogon and the 85mm Sonnar (in my dreams).
I also have a 40mm Sonnar that I bought with a Rollei 35 RF. The Sonnar is a great lens. It's an LTM lens with an LTM adapter that brings up the 50mm framelines. I bought an LTM adapter that brings up the 35mm framelines, which seem to be a better match.