Well stopped by the store on the way home from work, the Sigma 70-200 2.8 is a monster. I know myself I would be reluctant to use this as a daily zoom. The Canon 70-200 f4 was very nice but it doesnt solve my problem with low light situations. I guess I will be using PP and just live with some noise. F4 would only get me a one stop difference at max zoom. Let me tell you that is a fast focusing and very sharp lens. I just viewed the pics I took at the store all I can say is Wow!!! I want to thank everyone again with all of the advice. You guys have been very helpful.