Pretty much what I’m thinking of – to get a refurbish D600 .
Stan covered that part in his reply, but I just want to add to what Stan said, that D600 is the first FX affordable dSLR and everyone who had money for a camera body jumped on the FX train, without realizing that FX glass will cost a fortune and the results for an average user will be on par with results from D7000/D7100. That's one of the reasons for high return rate, which actually works very well for me, as prices are quite low for the refurbished D600s.
But i still think that my main camera will be a D400 and D7000 will be a backup while D600 will be an event camera or higher ISO needs camera.
On other hand I have kids and one of these days my daughter will take ownership of my D7000.