I've been looking for an upgrade walk around lens to my current kit lens, which is a AF-S nikkor 18-70mm F/3.5-4.5G ED. I've been tossing between the Sigma 24-70mm F2.8 EX DG MACRO and the Sigma 24-60mm F2.8 EX DG which i have read to have better optics and was a better lens. Currently the Sigma 24-60mm is a bit cheaper than Sigma 24-70mm which has macro. But the 24-60mm has a shorter focusing distance than the 24-70mm, how does that work, is it actually a macro? I was hoping that i'd be able to kill 2 birds with one stone and get a walk around lens with macro. Or would it be better to just get a separate macro lens? Has anyone had any experience with these lenses? I couldn't find a Nikkor lens for around the quality and price of the sigma. Would there be any other walk around lenses worth looking at? Thanks!!