For a pewter or gunmetal grey headset, I have seen only Chris King and Hope, but others may exist. Hope has some great products and some not-so-great. I don't know that I would buy their headset.

CK is somewhat expensive, but blingy. I would personally use a black or silver Cane Creek 110 if you want a premium headset. And honestly, I just bought a Cane Creek 40 for my MTB build, which is a very solid unit for a lot less money.