That's the lens I would really love, I'm just scared it is so big and heavy I would end up not using it as much as I would a lighter lens.
If you would plan to be in one area with it for an extended period of time, a monopod with a ball head attached to the lens is a perfect way to use it.
I don't use my 70-200 as much as shorter lenses, but it is an absolute pleasure to use it whenever the occasion arises. Yes, it's heavy. However, that coupled with the IS makes stable handheld shooting MUCH easier for me than when using lighter (and especially non-IS) equipment. The mass of the lens adds to its stability.
. I but of course I have no idea what you consider heavy. I will add though that I'm not exactly muscle bound 

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