Hi There,
I would say the 105 micro VR would be a good start,
I use one with my D700 and it works a treat,
A lot say the AF 200 f4 micro is a better choice if shooting spooky subjects that might fly away, or bite!
. This is true but a lot better shooting discipline is required the longer lens you use
I've found the VR an advantage when using the combo, (D700/105VR), hand held
I do use extension tubes at times but you will soon find depth of field, (DOF), will be a problem, (always a problem with macro
),
If DOF starts to become an issue, focus stacking software is an option
Not sure about your avatar? But I use the 105 to photograph all my flies, mainly saltwater
Budget and the macro subjects you choose to shoot will influence purchase
Lastly,
Lighting for is also something to think about,
Regards,
Gary