You can't beat the D4 for sports/PJ. D3s would be a great second. For macro the low noise at high ISO of the D4 and D3s won't come into play (you'll use a tripod, cable release, and MLU, right?), but the extended dynamic range may be a bit help depending on the light, diffusers, and whatever else you may use.
The SB-800 will work great.
If you're looking for a reason to say "yes", well, just go to the head of the class and get a D4.