One thing to consider about the Nikon mount is it is not a one piece mount. The rails are seperate from the unit that includes the rings, and it can easily be installed in a cock-eyed fashion, windage-wise. The cradle part that grips the scope will not automatically align correctly with the rails that grip your Picatinny. This can be corrected easily enough, but you might consider a true one piece design such as the version offered by Leupold.
I recently decided to switch over to the riser/extender type bases offered by Leupold and EGW, as they let you keep regular Picatinny rings on the scope. This allows me to swap my scope around to AR's or bolt actions equipped with Picatinny's very easily, or to tweak the height of the scope by using different rings. With the one piece mounts, you have to remove the scope from the rings on the integral base-rings units before you mount them on your bolt action. If your scope will not be moved from rifle to rifle, the one piece bases are probably lighter, cheaper, and more convenient.