Okay, so, I'm getting a macro lens (i've decided) for christmas. If I had ANY choice of a macro lens (under...let's say 500 dollars) what would it be!! I'd like some suggestions to start my research off of! I have a Nikon D40x and I think I'd like to start shooting the small things. Also, what do people usually use for lighting on a macro lens? Thanks for all your help guys :)

-Mojave