Stan -- I respect your findings and wonder how you feel about the D800 at higher ISOs. I shoot the D700 for a lot of news photography, including indoor sports and am just blown away by its ability to operate so noise free at 1600, and relatively so at 32 and 6400. I'd like to know what you feel about those ISOs on your D800. I don't need astronomical ISOs -- the 25,000 and above. But I have had reservations about 6400, which I need in at least two locations I often shoot where I shoot basketball at 6400 and get 1/250th at f4. Thanks in advance.