There is a comparison of the image quality of the D700 and D60 at ISO 1600 here. There is a description of the set-up and then crops at 100% showing the color saturation and the noise.
See this article comparing image quality between the Nikon D700 and the Nikon D60 cameras. The test was done in controlled lighting with similar lenses. There are crop shots at one hundred percent of the the central part of the photographs for detailed comparison. The full article can be found here –> comparing image quality in the Nikon D700 and the Nikon D60.
You can find the test in this article about taking photos in the early morning with the D700. The article is entitled The Moors Above Haworth. It shows a photo of a horse and a close-up of its eye, as well as a shot over the moors.