I dont really see any reason soon to change cameras. I'm still learning this one and I believe my photos will only improve as I practice more.
That said if I hit the lottery I think I'd prowel around and look for a D3x. I dont know why this camera fascinates me so but it seems like a nice compliment for the D700. Maybe its just that no one ever seems to talk about it much.
We have some killer old barns and homesteads down here on their way to ruin and Id love to catch some of them before they fall down.