I don't think N9 is going to give the same effect as what the renders show. The renders show a gray closer to GD (same as Space Cadet gray). N9 is just going to look black. Somebody already posted the real colors:
This set will look amazing with Dolchini... Can you go ahead and GB now?Show Image
This does not look like the renders.
N9 is one of those colors that will look different depending on lighting, maybe more so than most. There is no way to depict it perfectly, but I belive Oblotzky has rendered it well - he has access to it in real life as well. In poor lighting, it will look almost dark with no other pure black sources around, in other environments with good lighting, it'll look a lot brighter.
Here's a cap in good lighting shopped onto the basekit render, it's not far off.
However, as these are stock GMK colors, there are many sets utilizing both colors - please look up references for these colors before deciding to purchase if you are not sure what they look like in real environmkents. I would hate to have someone disappointed, especially when there are so many resources for these. :'(
Here's also GMKs own render for reference, do note that these have a tendency to be off at times - even when rendering the same color (I don't know why):