Ok guys, here goes another one!. Im the kind of guy that sold the O45 because i barely used it, not because i didnt like the IQ or the lens. But I love my P100-300 for tele landscapes, birding, and what not. And currently dont have anything in between my P25 and my P100-300. And i would love to get one of these for thin DOF, some portraits and really get some stunning resolution "short-tele" landscapes. Lets say both have the EXACT same IQ which one would you pick and why?. I know one is a macro lens. And is one stop slower Then the other is one stop faster but doesnt double as a macro, but is longer so compresses the background more and maybe creates "creamier" bokeh?. Also one is plastic yet weather sealed while the other is metal and not weather sealed. Basically my bottomline is, which one would you think is a more versatile lens? that would have more than use?. Ive only personally tried the O60. loved it. Havent tried the O75 but theres no one in Google (world) that could say a bad word about it maybe the only thing is that is TOO long?. thats why i dont even want to go into the IQ discussion. this is more about use than "quality".