I am doing the same but saving for D800, had a play with one today along with a D4, two awesome cameras, I can only dream lol.
Any of you guys got Facebook pages for your photography?
Don't forget a new pc with the d800 raw files! I too am considering a full frame upgrade and the d600 and a nice suite of fx lenses would suit me very well and won't break the bank but the lack of articulated screen always drives me back to Sony!