I've owned or still own seven of those in that list. They are all terrific, and throwing RF in with SLR in with high-end interchangeable RF AF like the G2, its just too wide a range of experiences and features to recommend one over the other easily. Heck I'd have a hard time choosing or recommend between the RTSIII amd the Nikons. That said if I asolutely had to get rid of them all and could keep only 1 body and 1 lens the Contax G2 with the 45 Planar would be it. If I could keep a whole system then the Nikon F2 with old 60's glass would be my choice.