Tom, Did you get the Nikkor or the Sigma lens? Seems like a big diff in price. The Sigma seems like a great bargain and consistently gets high praises. I've considered getting that for both macros and street photography and portraits, but I already have the Nikkor 85mm f/1.8D and like having...
You have some nice ones, Tom. Did you actually go back to get the tripod for any of them? Some seem just a tad off on focus or might have slight camera shake blur -- or maybe it's just movement of the insects themselves. I'm no macro photog though, so I probably couldn't do any better...