So... GW are finally releasing proper Knights models. And Gods they are beautiful. http://www.games-workshop.com/gws/catalog/productDetail.jsp?prodId=prod2380151a
My House Nordcote are obviously an Adeptus Mechanicus house, that much is clear!
At the weekend, when the official models are released, I'm getting one to make into my Baron - a bigger, funkier suit. I'll be swapping the official GW head for a sentinel cockpit, to tie him in with my existing models.
Then my current Baron (aka the Decimator) will be converted into an Errant. Then add lots of purity seals to all of them, so that he's not the only dude covered in them. I might also up-armour the Crusader and the Paladin. Think the Paladin needs shoulder pads, and the Crusader could do with a top on his carapace.
I'll possibly also build a Warden and a Castellan. The Warden's overlapping carapace reminds me of the Forgefiend, so that'll form the basis for that conversion. The Castellan will be similar to my Crusader, but with a Dreadnought torso not a Defiler.
Then I'll have models of all 7 knight types, which'll be nice! And led by the beautiful official GW model.