I would suggest the D7000. It has the focus motor which is a big deal.
As to lenses, the Nikon 60 or 105 macro wold be the way to go.
For the 60, it focuses really fast. You can use a Subsee wet diopter and that works well. The major problem with the 60 is the fact that in order to get true macro, a one to one image size on your sensor, you need to get in too close to be practical.
The 105 has a longer working distance but a tiny depth of field. Keeping things in focus is tough if there is any current at all if you are shooting true macro. Also this lens because of its telephoto effect is harder to control in autofocus. It hunts for focus and often misses the subject. With the longer standoff range, you can take photos of shy subjects.
The 60 is a much easier lens to use. You might think of getting a port for the 60 and use it while you get the hang of the system. You can use that port with a port extender for the 105,
You can get by with one strobe but 2 makes for not having the shadows behind your subject.