I am still trying to decide which camera and lens I am getting. My choices were the nikon d80 w/ the nikon 18-200 vr or the canon 40d w/ 17-85is. The choice is hard for me because I want the nikon lens but the canon 40d body more. So I am looking at the sigma 18-200 os for the canon trying to get the best of both worlds. Will this be a good solution? How much better would the nikon lens be to the sigma. Should I just stick with the 17-85is if I get the canon instead? Any help would be appreciated.