I made a crusader a while back out of a scout with marine arms and the bare head from the cadian guard kit.
Now even though I kind of like the fig in general I:
a) Sort of botched the paintjob on his face
b) Never really felt the head suited him anyway. It makes him look more like an acolyte or inquisitor, not a crusader
So, off with it! I'm replacing it with a helmeted head from the empire great-swords I just got in the mail from a bits store. I think we have a winner here...