Hi Moose great site! I'm looking to upgrade my kit lens in the near future and have been looking at the Canon EF-S 17-85mm f/4.0-5.6 IS USM. What is your opinion of this lens? I have read so many reviews on it and there are a lot of good, but also bad opinions on it. I will have to buy a used lens, as I'm on a budget and cant afford the price new. Thanks in advance.