Hmm, if I was shooting Nikon, these are some must haves:
- Zeiss ZF 21mm f/2.8 and/or Nikon 14-24G.
- Zeiss ZF 35mm f/2.
- Zeiss ZF 50mm f/2 makro.
- ZF 100mm makro, or the Nikkor 105 f/2.5 AIS or f/1.8 AIS manual focus (not macro lenses) are really great lenses, especially the Nikkor f/2.5 version shot wide open - for the price, it's amazing.
- Nikon 85mm f/2.8 PC, the new one or the old one, whichever. Perspective control and focuses down to 1:2.
- Nikkor 180mm f/2.8 AIS. Classic lens.
- Nikkor 200mm f/4 AIS. Compact, cheap, and high performance telephoto.
- Nikon AF ED-IF 200mm f/4 macro (I'd use this on Canon too, for macros).
- Nikon 200mm f/2 G VR (if you win the lottery?)