Camera finder quality

This winter must be colder for the people with no good memories.
Over 10 years used Canon EOS 10D digital format body might be ended it's life, because the pushing button of lens locking has gone away. As mentioned yesterday, Canon 7D would be the best choice for me, because 5D Mk3 might be a best one but expensive for just enjoying as a amateur's hobby nor the lack of finder qualities in Kiss model and 6D are not acceptable,  too much distortion feeling vomiting in seasick. 
Camera finder quality an indispensable requirement for me as I recommend Leica M model M3, no later model are incomparable with it. The fact would be cleared if they were disassemble in parts. It took me full one day to disassemble it as a periodical overhaul procedure and to reassemble as a original construction including shutter speed and range finder calibration.