You don't need IS for any action photography. For shooting indoors, just turn your ISO up. Sure it makes a little noise.... but it's cheaper than IS. I am convinced when you pan around with IS it doesn't even work that well anyway.
IS is best for portrait shots etc, i.e. static stuff. So.... if I were you I'd just get the 70-200mm f/4.0. That way you won't break the bank... and still get a fantastic lens.
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Jason Moller
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