I have the Nikon D-200, and wonder if any of you have experience with the Nikon 12-24mm ED-IF AFS DX zoom or the comperable Tokina lens? Also, has anyone used the Nikon 24-120mm f/3.5-5.6 ED-IF AFS VR? I would think that the quality would be much better than the new 18-200 VR DX.