Wanna win a signed copy of Chosen of Khorne?

So, my beautiful girlfriend and I are off travelling the world in 3 weeks time (and I'm planning to do lots of writing along the way) - so I am currently doing lots of cleaning, boxing up, storing, chucking out and selling stuff. Fun. While doing this, I came across a spare copy of Chosen of Khorne that I'd not given to friends or family, and thought it'd give it away to someone. Grr. Arg.

So, here's the deal. To score yourself this copy, I want you to tell me who, in a Black Library story/novel/audio/whatever,  you would most like to see Khârn fight, why, and who you reckon would be the victor. 30k, 40k - whatever. Bring on the smack-down!

I'll leave this comp open for a week, so will pick my favourite response next Monday evening, Sydney time. Make sure to leave your details so I can get in touch and find out where to send the signed audio if I choose your entry as the coolest/funniest/most generally rad.