I no longer own the D600. I won’t get into details but I am once again in search of a full frame camera. I wish it wouldn’t have worked out this way because the D600 had so much potential and could have been as dear to owners as the D80 and D90 were; however, I couldn’t deal with the sensor spots anymore despite attempts at fixing the issue by Nikon. To Nikon’s credit, even though at first they denied the problem and were giving me a hard time about shipping, since the issue became news, they were paying for shipping to send it back.
So where to go from here? Probably the D610. I don’t see myself getting the Df because I don’t care about the retro look nor the big price. For that amount, I’d get the D800 and put up with the 36MP’s. Even with its faults, the D600 was the best choice at that price range. For people who are buying the refurbished ones, they get a great deal but they probably have to deal with the issues I dealt with. Still, for $1400, dealing with cleanings would be worth it. I just couldn’t do it anymore given how much I paid.
Anyway, this is what the D600 can do when it’s clean: