Misleading title in some respects, however I am tossing up between the 17-40mm and 15-85mm. On the grey market, they are around the same price. I guess my main consideration is that if I upgrade to full frame in the future, the 17-40mm will move with me. However the 15-85mm offers more scope for width at the lower end. I already have a 100mm f/2.8 and 50mm f/1.8 outside of my 2 kit lenses so am not too bothered by the 85mm, although might be useful in a walk around type situation?
My main interests for this lens would be landscape & inside shots ie churches or parties and the like.