top-of-the-line walkaround lens (does everything well enough): Nikon 18-200mm f/3.5-5.6G VR (D200 kit lens)
plastic fantastic: Nikon 18-55mm f/3.5-5.6G (D50 or D40 kit lens)
less expensive walkaround lens: Nikon 18-135mm f/3.5-5.6G (D80 kit lens)
prime: Nikon 50mm f/1.8D (every photographer should have a 50mm prime; it's the standard lens for 35mm, and perfect for portraits on APS-C digital)
I always stick with all-Nikon or Nikkor equipment. This is what is looking up at me when I open my camera bag:
- Nikon D50 w/ 18-55mm f/3.5-5.6G
- Nikon 55-200mm f/4.0-5.6G (I hope to replaces this and the 18-55 with the 18-200VR someday)
- Nikon 50mm f/1.8D
- Nikon 24-85mm f/2.8-4.0D
- Nikon SB-800 speedlight