I just pulled the trigger on a new D600! I'm upgrading from my D5100, and so far I'm very impressed. Unfortunately after about 60 shots, the worst happened... dust on the ******* sensor . I knew it would be inevitable, but are you kidding me? 60 shots in?! I'm charging the battery up so I can hopefully blow it off. Otherwise I'm very happy with my purchase, and I look forward to posting photos on here.