Hi Stan, I appreciate your objective analysis of the 18-105mm lens. I think one of the major reasons that some discount that lenses, in comparison to the 16-85mm lens, is the plastic lens mount rather than metal. I don't think this is really a problem, unless I drop the camera - which I've never done since my first Nikon camera (an original Nikon "F" purchased in 1965).
From my point of view, the 18-105mm lens that I purchased with my D7000 as a kit lenses during the Fall 2012 "Black Friday" sales essentially for free (cost of the kit was $996.95 from B&H Photo), is definitely a keeper lens. If I was faced with a choice of the 18-105mm or 16-85mm as a standalone purchase I'd probably still choose the 18-105mm lens. The cost difference in the two lenses simply doesn't add up, in my opinion ($232.05 delta in price).