Next lens purchase suggestion.....

[TucsonTRD]

Why in the world would you consider selling your 70-200 f/2.8 L in order to purchase a 70-200 f/4 L IS? Are you wanting your new lens to be dedicated to macro photography, or are you wanting a general purpose lens? What are you wanting to shoot? Is your camera a crop-sensor or full frame?
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He has an EF-S lens as an option, so I imagine he has a crop sensor.

[Sean Setters]

Why in the world would you consider selling your 70-200 f/2.8 L in order to purchase a 70-200 f/4 L IS? Are you wanting your new lens to be dedicated to macro photography, or are you wanting a general purpose lens? What are you wanting to shoot? Is your camera a crop-sensor or full frame?
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He has an EF-S lens as an option, so I imagine he has a crop sensor.
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Good point. ;-)