The engine bay looks nice with the new paint but I've always preferred a lighter color in there so I can actually see things when I have to work in there. Also makes it easier to find leaks etc. Black and dark colored engine bays absorb all the light and its like looking into a cave.
As far as motor mounts go keep in mind that the 4bt is pretty heavy. So choose a mount built for the weight. Or if you have space you could get creative and span the mount across two mounts to spread the weight and vibration