Thanks Nick, Jon and Keith.
I keep telling myself that two bodies may be the answer. It would mean comprimising on lens quality I guess. If I could be convinced that I could get excellent, publishable landscapes from a DX camera with a top notch lens, I would be inclined to go for the D300s and Nikon 17-35 f2.8 and stick with a Sigma 150-500mm for wildlife.
I was wondering. If taking a shot of a bird with a full frame camera, then cropping, would I get the same quality image, as a shot from a DX camera that has been cropped at source, Hope this makes sense. It seemed to, in my head, but reading it back......?
Wizzo