There are 2 versions of this the D800 and the D800E. Looks like if you shoot JEPG you are good with the D800, but if you are a RAW shooter then the D800E might be a better option.
I'm the type who are totally happy with less than 30megapixels. I mean at 36+ MP a RAW file will be near 100MB... I really don't need that unless I'm doing a 100feet by 80 feet print...