While I have the 70-200 ii 2.8 is. I seldom shoot it at 2.8.

It would be interesting to wait for the new 24-105. I love the utility of the original but it is too soft on the long end for me. I am hopeful that the long end will be better.

Moving f4 means it is almost a 2 for 1 in the lens count budget for 1 stop. Hmmmm