OK, so sell me on Nikon ...

I've posted a few times here, being disgusted with my (ex-) Mk III and intrigued by the D3.

Generally, how is the AF? Sports? Low light?

Is the Nikon SB flash good? How about wireless operation?

Is NEF still around? What is it? Does the D3 shoot "real" RAW (i.e., contertable on third party programs (I use CaptureOne and like it, but not unwilling to change)?

Anything else you can think of ...

TIA

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Sonoma County, CA