Since you shoot a lot of different subjects (from indoor sports to outdoor), do you think that the IS in the 70-200 f/2.8 lens is worth it?
For sports it really isn't all that useful. Outdoors I'm 1/1000sec or faster and
indoors try for 1/focal length at minimum. I have switched it on for indoor
sports in really bad lighting, but I'm not sure if it really helps or hurts when
some subjects are moving and some are still.
But for general purpose use IS on ANY lens is invaluable IMO. I originally had
the Canon 18-55 non-IS and the Sigma 70-300 (no IS). Next step was to
swap both of those out for models with IS, that's how much I value it. When
it came time to get the 70-200, the IS was a no-brainer for me. For any
"non-action" shot I will have it on (with all the lenses).
It might not be for everyone (if you like to use a tripod, etc), but for me it
was worth it. Another pretty big factor (which may not apply to all people) is
the weather sealing on the IS model. When "paint" filled pellets are flying
around it's nice to have some decent sealing.