Many people already answered nicely, so let's joke a little
According to Ken Rockwell best cameras are nikon. Once long time ago camera manufacturers give to Ken two cameras, and better one was called nikon, worse one was called canon. Later they gave him some other crap - and he sad - "this is worse than canon". That is how pentax was born .
Of course when Ken become rich - he was able to afford Leica - and he realized what all we known about Leica cameras