>Changing over battery system and memory cards would add >several hundred dollars to the value equation. I'd need to >replace 6 batteries and a bunch of cards if I were to go the >D7000 route.
Ah yes, I would have put that on the list, until yesterday, when my house was burglarized and they took every last piece of camera equipment. A clean slate changes the equation. Nikon has always been good about battery compatibility between, say D50/70/100, D80/200, D90/300. I'd guess the new D800 & D400 probably share a battery with the D7K.