Quote Originally Posted by another view
Nikon's 105 Micro (as they call their macro lenses) is a great lens, but I'm not sure what your budget is. This link will take you to that lens at the place I get most of my equipment from. I hear Nikon's 60mm is great too, but no personal experience with it. Be sure to check the reviews on this site.
Most manufacturer's 100mm (or so) macros recieve high ratings. I absolutely love my Tamron 90mm. It is a good bit less expensive than the Nikon 105mm. I have heard really good things about the Sigma 100mm, too (which would be less expensive, also.) PM me if you want to see some sample shots from the Tamron.

In general, I think something like a 60mm is a little too short. You have to get right up on whatever you are shooting, which would work for bugs, etc.