I am looking to upgrade my kit lens and relegate it to backup duties. I think I have it narrowed down to the Canon 17-85 f/4-5.6 IS USM and the Tamron 28-75mm f/2.8 SP XR ZL Di LD Aspherical (IF).


I mainly take pictures of kids/family and flowers/nature. One thing that I keep coming back to is the speed factor of the f/2.8...


Thanks for the help/thoughts in advance...