Net render is for multiple work stations (or render farm) your machine will take advantage of all the cores with out it. As for RAM the 32 bit version of C4D cannot take advantage of more than a couple gigs however this plays a very small role in rendering..
Your render times are directly related to whats in your scene. Since you have a lot of hair other factors like your lighting, ambient occlusion or global illumination, highly reflective (with blur) materials, Sub Poly displacement are going to play huge roles in the render time. You should even look at the amount of segments you have per hair.
I have a simliar system with osx 10.6 and cinema 11.5 and I am rendering 250 000 hairs in 15 seconds on a landscape object. So i suggest you take a look at your scene and see what you can optimize, bake or fake.
/Randy