Thanks for the feedback so far. As far as usage, it would be more kid chasing on the playground and soccer fields (ranging 4 months to 8 years). General outside hiking, tourist stuff. So wildlife would be catching what I see for memories.

I have been reading all of the reviews here on the lenses in question which really started my thinking and putting this post up. I really didn't expect to be looking at L-lenses at this point. But seeing the sharpness difference between the lenses caught my eye and wanted to get some more input before picking a direction.

I am new, so I don't want to buy a lot of lenses I may not end up using. My current lens and the 70-200/300 will cover a great range and if it goes well, I can specialize from there. Its always the age old issue of balancing price with need. But if I can spend a few extra dollars and get those great pictures, it would be worth it.

Again, thanks for the advice.

Eric