I bought a sigma 70-200 f/2.8 off of the forums here. After my first wedding with the lens (not my first wedding ever, that is) I see I need to be really careful with it until I can trade up to a 70-200 f/2.8 IS canon. I don't regret the buy, because otherwise I would still be on tri-pod with the 75-300 f/4.5 is, it is all I can do for now.
Those asking the recurring question: "do I need IS?"
The answer, if you are shooting inside without flash, is YES!

