I currently own a D200 (it's been great all these years) and will be moving to FF. I am concerned about all the memory (computer and memory card) required to shoot the D800 at full resolution in RAW. So my question is: how will a picture shot with the D800 at the medium image size setting (about 20MB) compare to a picture shot with the D700 (12MB) at full resolution? And which option will give me more latitude to crop and enlarge to A0 format and beyond? I don't really care about the video capability of the D800. And I do not want to compromise on low light, low noise capability - we already know that the D700 is a winner here).