Welcome to Nikonians! Both the 18-55mm and the 18-105mm are entry level lenses. The primary difference is the 18-105mm will provide more range at additional cost. In other words the 18-105mm is more versitle than the 18-55mm so you are paying for convienience. Same can be said of the 18-200mm VR. Both lenses will work perfectly on a D300S. Depending what you will be shooting in the future you may find yourself wanting faster lenses and zooms with less range 17-55mm for example start at about $1250.00 and go up frome there. As both lenses are DX although they will work on a FX body (D700, D3, D3X) in crop mode only, it would not be a very good match because you would only be using the center portion of the sensor. Good Luck and Enjoy your Nikons!