I have a Canonet. But I've come to realize its limitations. I bought it more just to have a rangefinder rather than really wanting a Canonet. I am currently looking at the 50s Canon rangefinders. I've narrowed it down to either a Canon IVsb or a Canon P. How much user difference is there between these cameras. Yes, I will admit part of my choice is aesthetics of the cameras. But are the newer ones really that much better that the older ones?