You sir, (AS ALWAYS!!!) created a masterpiece. Those night lords look terrifying and yet they have the Legiones Astartes look, you found the exact balance between conversion and "original" form. Maybe you can decorate some of them with cut-off hands/heads/whichever body parts would suit the models. However, thats some kind of personal impression of the Night Lords that got stuck in my head while reading the Horus Heresy novels.... To keep it short, this squad is awesome, GW should hire you, then everybody is happy!