I am thinking of getting the Canon Zoom Super Wide Angle EF-S 17-55mm f/2.8 IS USM How can I sell my wife on this sale? What is this lens going to do for me (besides Image Stable) that my kit 17-55 that came with my Rebel XTi won't do? If you could tell me in "Hobby Enthusiast" terms for me... and maybe a little watered down version for the wife! I have a good Telephoto already, but I am looking to improve my Short range..... I just need to sell the wife on $1,000 price tag.... HELP!