well it finally happened I received my new lens to replace the old one 16-35 2.8 and what a great piece of kit
I now have 50mm 1.2, 135 f2, ,24 -105 f4 , 100 400 f4 and 17-34 f4 along with 2x doubler will probably sell the 17-34 as I think it will be superseded by the 16-35
I have found that all lenses have a particular application for my style of shooting and to date very happy with the results
I am seriously thinking that i should round off the collection with the 85 mm L series to complement the range
I have found that the 50 mm and the 135 are my lenses of choice for everyday and feel that the 85 will be a nice "in between"