Hey guys, I'm looking for your input. I'm in the market for a new macro lens. I shoot Nikon (D300), and have considered the Nikon 105 mm f/2.8 VR and the Sigma 150 mm f/2.8. I already have the Nikon 60 mm f/2.8, and while it's a great lens with top notch quality, I'm getting tired of such a short working distance. The new lens will be used 99.99% of the time for macro shooting. I'm not all that concerned about picking up a portrait lens. I know the Nikon is a popular pick, and is a solid lens. It's also approximately $270 more than the Sigma. I haven't heard a lot about the Sigma 150, but the shots I've seen on Flickr look pretty darn nice. I like the Sigma's price, but I'll drop the extra $270 if I'm convinced the Nikon is worth it. I'd love to hear from the Nikon owners, the Sigma owners, and if there's anyone that owns both, you get double points for your input! Fire away!