What is the correct setting in Adobe Premiere CS6 for Nikon Video? I have a Nikon D600 and when I set up a new project in Adobe Premiere CS6 there are many options available for Sequence Presets. I suppose this could be a subjective question, but what is the best preset for Nikon DSLR video? ARRI? Digital SLR, etc.?

Thank you.
The best option is going to be a format which matches the resolution, pixel pitch, frame rate and color format/color space of your original footage.  These settings can typically be changed based on the shooting mode you used on your camera, so there is not enough detail in your question to give a specific setting.  If you actually open up the footage file, it should show these details in the properties for the clip and you can choose a sequence preset accordingly.