I thought strand hair was only needed when you wanted to use something like wind or other high dramatic things. If all you're doing is moving the character's head a little bit, why do you even need dynamic hair? Couldn't you get a good prop hair with movement morphs to get a realistic effect for soemthing like that? Plus, with all the rendering time you'd save yourself by not using strand hair, you can make the lighting and skin all the more realistic!! Think about it that way too.