Sorry, but the D7000 is not "very, very close" in high ISO performance. I regularly shoot both bodies, and the only reason I even take the D7000 with me on dance and sports shoots, is for emergency use (if the D700 were to take a crap in the middle of something important, which it hasn't). The ISO 4000-5000, even 6400 that I must shoot with the D700, with very impressive results, looks like garbage if shot that high using the D7k, when compared side-by-side). ISO 2000, maybe 2500, is the absolute limit for anything I'd feel comfortable selling with the D7k. It really goes to pot any higher than that. Don't get me wrong, it's impressive for a crop sensor, but don't try to equate it with a D700. I personally put the IQ at high ISO at about 1.5 stops better for the D700, and I've looked at hundreds of comparison shots.
Like I said before, the D7000 is a great camera. I love mine for certain things. It's a nice enthusiast camera, approaching pro capability...but it does not hold a candle to the D700. And it is obliterated by the likes of D3s and D4. Sorry to burst your bubble, but someone has to wake you up to reality. As a user of both cameras, I feel like a qualified deliverer of the wake-up-call...
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K.B.