I have THE reason for still photographers to upgrade from a D700 to a D800. Here it is ... wait for it ... here we go ... the reason is ... oh, wait ... there isn't one. When the D800 came out, I bought another D700 from a D800 upgrader Just seems like people fall for that "latest & greatest" factor all too easily. Reminds me of the poor elitist saps camped out overnight waiting for the newest iPhone (really!?!). I'm a pro shooter out of Fort Worth and shoot everything from enviro portraiture to action sports and have yet to find a limitation or flaw with the D700. If you think back to all the AMAZING & INSPIRING photographers of yesteryear, do we really ever think, "Gosh, how could they have created such brilliant images without a high end Nikon DSLR? I think not. It's up to the shooter - not the camera. If you have a D700, think about keeping it and investing that D800 upgrade cash into lighting or glass. Just sayin'.