I have a D4 instead of the D3s though I imagine they have similar settings.
Why don't you use Adobe RGB instead of sRGB? Why limit yourself to the color space with the smallest working space?
To take advantage of shooting RAW, it's recommended that shoot with the highest bit depth. On the D4, it's 14bit.
When you use Adobe Camera RAW, you can open the NEF file as 16 or 8 bit with 16 bit being preferred if you want the most color information. Also, using Adobe Camera RAW you can open the image in the ProPhoto RGB space, though you need a good monitor to take advantage of ProPhoto RGB.
Since I've never used Nikon's software, I'm not sure how they compare.