Hello rs_photography, and welcome (back) to the friendly Camera Labs forum!
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As to your Q: If I had a D7000 I would almost certainly have abandoned my D300 some time ago. But still I would long for a full-frame body! Unfortunately I buoght my D300 just a few months before the announcement of the D700. If I had known this I would have continued with my D80 until I could have bought a D700.
Full-frame bodies are like nothing else:
- They capture 2.25x more light than a DX/APS-C-body and thus are always better at signal-to-noise ratio than any camera with a smaller sensor.
- You can get more background isolation /shallow dof from a FF/FX-body than from a DX-body. The effect is equivalent to about 1 stop. So you would need a f/1.0 lens on a D7000 to have the same shallow dof than with a f/1.4 lens on a D800.
So a FF-body gives you some things that you really can never reach with a smaller sensor and the D800 especially brings the absolute flexibility to the table: Fully use the extraordinarily high 36MP resolution (with SNR that is rumored to be around the same as with the D700 on pixel-level) or sclae back to 16MP or 12MP and get the benefit of very good high-ISO capabilities.
The only thing the D800 is not flexible is speed: If you absolutely need more than 4-5 fps you need to get another camera.
Thomas (beware: Nikon-fanboy and moderator!) My Lens Reviews
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