Wow, I must be dumb and blind as well. Can someone point out the flaws? I actually started a post sometime ago between the 1.4 and 1.2L which I was trying to decide which I should purchase. I was just going to go with the 1.2L and get it over with although I may not be able to tell the difference between two.
I just don't want to be thinking about the 50L as I do now with the 70-200 f/2.8 IS due to my purchase of the f/4 IS. They are all good lenses. I guess if you have the money why not. Then again, it is painful!