Superwide:
-Tokina 11-16mm f/2.8
-Tokina 11-20mm f/2.8
Wide - Midrange:
-Sigma 18-35mm f/1.8
-Sigma or Tamron 17-50mm f/2.8
-Nikon 35mm f/1.8
-Nikon 50mm f/1.8 or f/1.4 OR Sigma 50mm f/1.4
Mid - Tele:
-Nikon 85mm f/1.8
-Sigma 50-150 f/2.8
-Nikon 70-200 f/2.8 VRI or VRII
-Tamron 70-200 f/2.8 VC
Personally, I love the Nikon 24-120 f/4 on DX, but that's personal preference.
-Tokina 11-16mm f/2.8
-Tokina 11-20mm f/2.8
Wide - Midrange:
-Sigma 18-35mm f/1.8
-Sigma or Tamron 17-50mm f/2.8
-Nikon 35mm f/1.8
-Nikon 50mm f/1.8 or f/1.4 OR Sigma 50mm f/1.4
Mid - Tele:
-Nikon 85mm f/1.8
-Sigma 50-150 f/2.8
-Nikon 70-200 f/2.8 VRI or VRII
-Tamron 70-200 f/2.8 VC
Personally, I love the Nikon 24-120 f/4 on DX, but that's personal preference.