Hey all. I have had a few posts before this in the same field; I am in the market for a wide angle-telephoto/zoom lens. I have a Nikon D40 (so i need the built in motor). Was asked to take some candids at an upcoming wedding. Don't have an iTTL flash yet, will buy with lens. I am between these lenses: Sigma 70-300mm Sigma 55-200mm Tamron 70-300mm Nikon 55-200mm Any feedback or suggestions would be greatly appreciated. Thanks!