Ok, here is my dilema. I am selling my 70-200 f4(great lens) to get something faster. Reason for upgrade is both children getting into hockey and dancing. Will be shooting hockey and dance performaces indoors. Own 30D and 5d2, 24-105L and sigma 50 1.4 and Kenko 1.4 extender already. Thinking of 70-200 2.8 IS or 135L mostly using them wide open.Many say the 70-200 IS wide open is soft therefore leaning to 135L cause everyons says its very sharp wide open. Any opinions would be appreciated. Thanks


