Ok, following a discussion in the Background forum, I've been considering a GK army. I've got some fluff ideas that I'd really like to play with, but I'd like some idea from you guys to suggest where I should go with this.
I'm not going to go into the story in full just yet, but here are the guidelines I'm looking at.
1; Minimal GK bodies on the field. I want the impression of a small GK force, a detachment fully seconded to the Inquisition rather than a Brotherhood in their own right. Perhaps with heavy equipment to make up the lack, but still, I really want the idea of a minimal number of bodies, at least for the Knights themselves (see #3).
2; No purifiers. Fluff reasons, I'm afraid. I can work in a Paladin unit into my planed story though (though with them being that expensive, I'm not sure how good an idea they are.

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3; I want the Inquisitorial Warband to be useful and helpful. There are a lot of options, but I'm really not sure what's best with them. Any thoughts on how best to put a Warband together?
4; HQ choices are the one thing I have set in stone: Brother-Captain and an Inquisitor. I'm less set on specific load-out though, or even the Inquisitor's Ordo... any advice?