Well ... it looks like the family is complete now. Since a few days there are also the Maximus VIII Extreme as well as the Maximus VIII Impact. Apparently all boards have been tested already in our charts and so far there are the following articles on the boards:

ASUS Maximus VIII Hero Review
ASUS Maximus VIII Gene Review
ASUS Maximus VIII Ranger Prview
ASUS Maximus VIII Extreme Preview
ASUS Maximus VIII Impact Preview