My current "arsenal" comprises a circa 2005 Sony DSC-R1 with a 10 mega pixel CMOS sensor and a lovely fixed Carl Zeiss Vario-Sonnar zoom lens, which takes fine photos but weighs a ton, and two Panasonic Lumix Micro Four Thirds cameras, with native (Panasonic/Olympia) zoom lenses. More relevant to this query, however, is my currently preferred use of the M43 cameras with legacy 35mm film lenses. However, the M43 cameras have smaller 12 mega pixel sensors.
Through evolution of my photo-taking practices and interests (which include various techniques of panorama stitching), I find my current needs have become quite simple(!) and basic. What I need is a digital "platform" (camera) on which I can mount 35mm film lenses (with adapters) but which has a larger sensor with more mega pixels than I have access to at present. And which, hopefully, needn't cost an arm and a leg. And I really would prefer handling the focusing and exposure manually. Other of the usual, current bells and whistles I not only don't need, but don't even want (but know will likely be installed in all current "platforms" anyway).
I will welcome any suggestions for models of digital cameras currently on the market, either new or (preferably) used.