I have both the EF70-300 IS and the 70-200 f2.8 IS ...sold both and brought the 70-200 f4 IS....
I love the weight, build and the IS of the f4 IS. As I find my f2.8 a while elephant to me, cuase i dont need to shoot at f2.8 and the weight is not favarable for travelling.
I used to travel...