Welcome to the D800 club! Superb camera, and one of the few non Nikon lenses I would endorse!
Storage concerns are over rated IMO. Hard drives are Mega cheap these days. I bought a 2TB hard drive along with my D800 and it is just for my photos. It will be a long while before that is full.
One thing that I have found though is that Lighroom stutters a bit when rendering D800 files. I have a custom built beast of a computer system and the only time I have seen it struggle (only a bit) is with D800 images.
But forget all that! Enjoy your new toy!