In order to give you a good answer, I'm going to have to ask what camera body you're going to be using. If it's the D90 (IIRC the other thread properly), then I'd suggest the 35mm f/1.8G lens.
I have both lenses (and a D300), and usually wind up with my 35mm lens on unless I'm shooting a specific format (half-length portrait, etc.) where the tighter crop will allow for more detail.
Hope this helps.