Mark, would you consider the Sigma 18-50mm to be of a higher quality than the kit lens for a walk around? As far as the Sigma 28-70, I feel like it would nice to have the lower apeture as it would be easier to use for concerts but from what BoYFrmSpC said, I'm worried that it won't be wide enough for urban shots which I will be taking plenty of next year.
As far as the zoom and prime it looks like I'll be getting the Sigma 70-300 and the Canon 50mm. I meantioned this in another thread but what makes the APO lens so much better than the non-APO?
Thanks again for all the advice.