Is it me or my D600 not quite right

Hi All

I have a D3s and had a D700 - really happy with both.. but at time sfelt I needed more MP mainly because of cropping and why not. Anyway, I goit the kits lens 24-85 and used the 70-200 F.28 VRII and 14-24. Every photo I took was soft or just did not seem sharp.. However when I put it through View NX ( I always shoot RAW) and adjust the sharpness to between 5 and 7, the difference sharpness in is like night and day!

With the D700 and D3s, the photos needed only slight sharpening. My default setting for sharpness on the camera is at 0… should I move it to the centre.

The same lenses on the D3s result in much sharper images straight out of the camera.

Also is it worth upgrading to the NX2 from View NX

Thanks

Tan