I tried out the D600 with a few of the older Nikkor lenses like the 45mm F2.8 manual pancake lens (sharp), the AF-D 18-35mm F3.5-4.5 and the 80-200mm F/2.8D. All with very pleasing results.
The focusing system did a really good job in combination with the AF-D 80-200mm F/2.8, a lens that saves a lot of money if you compare it with the cost of the more modern AF-S 70-200mm F/2.8G VR II.
The images can be seen here:
Looking forward to doing some more testing with the D600's HD movie recording features over the long weekend.