Love my D80, but the kit lens is slower and a bit soft. Spoiled myself with a 50mm f/1.4 and a 70-200 f/2.8. I do like the range of the 18-135. Are you looking for speed or range? If you're main area of photography is kids, I'd opt for a fast lens. Even the nifty fifty is worthy (50mm f/1.8, about $100). I thought you were sticking w/ Canon? Feel free to "come over from the Dark Side". hahaha!