High., You will be fine with either mount. I have half XR ( 20 MOA) mounts and honestly for most of my shooting, heck, all of my shooting, it is a non-issue. I have gone to 600 yards a couple of times without a problem, one time going 5-5 on a 10 inch steel plate at that distance. Believe it or not, that's pretty darn good for me!
I think you'll be very happy with that scope choice. Not sure if you got the Nikoplex or bDC reticle, either way make sure you check out Nikon's Spot On Website. It'll give you a lot of shooting info dialed into your specific data.
Post a pic when you get everything mounted up.
http://i1216.photobucket.com/albums/...40/m-233-2.jpg