I'm sure it will be a boat load to purchase a new D4,,,I'm not so sure that the price of used D3's will droop to far either,,,It will have to take a large amount on the market and a good deal of time to pass before they come down in price a substantial amount.
One thing that I am not happy about (since were on full size model/bodies) is the shear fact that the new model/bodies are getting smaller and smaller, I mean the new D7000 is like the size of a D40, I know they pack a ton of features in them as well,,,,but, I don't know about you all,,,but I have come to like a nice large wind and deep body in my hand. Now I know it's heavier,,but I feel much more in control with a large solid body in my hand, What are your thoughts on this.