I've just started to collect a new Drukhari army, intending to keep it to wych cult and kabal units. Hoping to build it big enough to play with before the codex comes out and makes all the options I've modeled illegal.
I still have my old Witch Hunters army, which was never very big (made for an 850pt competition) but is 100% metal. It has plenty of nuns-with-guns, so the temptation to expand into an Adepta Soriritas army is strong. But I must resist until the Drukhari are a playable size!