dun have kit lens.. gave that up and bought the 18-200mm VR lens instead..
Seriously dude, Tripod, VR, 60mm, 105mm, remote trigger etc, are all tools. Its up to the individual (you?) to use them to whichever combination most effective.
If i were you, i'll seriously stop thinking about the lens first and sort out the lighting conditions and shooting distance that is effect for your work, before parting with cash for lens. Probably using proper lighting and your 18-200 at 150-200mm will be a close simulation for the photos you are after.
I have used both the 60 mm and 105 mmVR, and both are optically excellent. The 105 almost cost 3 times more, but in my opinion, the 105mm focal length enables a much more comfortable working distance. VR is not really necessary for macro work , but with it, imo, the 105 becomes a hugely versatile lens, enabling it to be used beyond macro photography.