Best nikon macro lens?

I have a Nikon D300s, and want to invest in a macro lens for underwater photography & nature.

My friend has the Nikon 105mm VR Macro Lens - results are outstanding.

I would suggest the Nikkor AF 60 mm f/2.8

http://www.uwphotographyguide.com/underwater-photography-lenses

For Nikon cameras, the Nikon lenses tend to be the better option