Hello guys, I want to purchase a Nikon D80 for my first DSLR camera. I had a little bit of experience with DSLR because my friend used to own a D40, so I know the basics, like how to manually expose photos etc. I want to get my own Nikon D80, I have done a lot of research on the Camera and I think its the one for me. I have been recommended the Tamron 17-50 f2.8 lens on another forum, and also the Sigma 18-50. I did some research on POTN on the Tamron 17-50, And I think it would be a good lens for what I'm going to be shooting which is mostly going to be mostly Nature, Cars, and people. So those of you who own D80's and have the Tamron 17-50 or the Sigma 18-50 lens on it, what can you say about the lens? Should I get it or should I get another lens? Any suggestions/help would be greatly appreciated. Thanks.