Hey all, I've spent the last 3 weeks or so reviewing products deciding what to get. I've decided on a Nikon D80 w/ a Tamron 17-50mm f/2.8 lens. I also want to get an additional lense to bring in things if needed. I won't need it for low light so I'm not too terribly worried about the aperature on it. The three lenses I've been looking at are: Tamron 70-300mm f/4-5.6 LD DI Macro 1:2 Sigma 55-200 f/4-5.6 DC Zoom Lens Nikon 55-200 f/4-5.6G ED Lens I'm not sure which one would be the best as a secondary lense. I like the macro function of the Tamron, but it has some problems with color shadows, the Sigma seems to be a good middle ground, and Nikons has problems with distortion. Need help deciding. Thanks.