Sam Dunn’s Metal: A Headbanger’s Journey is a fanboy’s/girl’s dream come true. An inside look at the Rodney Dangerfield of music, metal finally gets some respect in Dunn’s throughly entertaining and well-researched 2005 documentary. In addition to being a hardcore metal head, Dunn has a degree in anthropology, so he not only brings a fan’s enthusiasm to the mix, he brings a scholar’s insight to a genre of rock that is often shunted-off as being music for dummies. Dunn sees more in the metal…