Georgette: I feel your pain - BMW did this to me a few years ago. They basically took their bread and butter car (the 3-Series), one that you could carefully option out to be the best driving car in the world for just the right price, and took it up-market, with all these packages you have to buy to get the few things you really need. Now, you can't option it the way I want it for what I can afford to pay - so I am effectively out of their market.
That said, if the lowest priced Nikon FX body is beyond your means, then any new D400 would surely also be beyond your means. I guarantee you that if the D400 we are waiting for ever comes, it will be priced higher than a D600. Probably a lot higher. Based on all of Nikon's recent pricing (except the D7100?) there could NEVER be another pro DX body for under $2,000.
Put a gold band on any lens these days and Nikon expects to get $2,000 for it. Put pro controls on a body these days, and I'd expect Nikon to try to initially get $3,000, even with a DX sensor.