I'm saving up for a Rebel XSi, and was thinking of purchasing a Canon EF-S 17-85 instead of getting a kit lens. http://www.bhphotovideo.com/bnh/controller/home?O=workaround.jsp&A=details&Q=&sku=351548&is=GREY Any thoughts on this lens? I figure it'll feel familiar switching from my 35mm with a 28-55. Unfortunately I don't know much to look for in glass besides that you need to spend some cash here to make it worth your while. Thanks!