Also, personally I wouldn't use these for a Scavenger; to me full head masks just don't seem to look right, unless you're playing a bird (which is why Madcap is the exception)
I feel like you lose a lot of facial expression behind all that hard work, and while they look spectacular, if they don't allow for eyebrow movements, it becomes a lot harder to 'become' your character to other people.
My 2 Cents. (or copper, whichever)
-Ali