Those distinctions are worth way more than a cup of coffee, but sales of Metallica's 5 worst-selling releases top those of Anthrax's 10 discs. The band's lack of commercial success only adds credibility to its catchy, relentlessly innovative headbanger fare, which incorporates humor, social consciousness, geek culture, and a healthy appetite for adrenaline. By the mid-'90s, half of the classic lineup was replaced by players including former Armored Saint singer John Bush, who helped the group's transition into a truly unique, progressive-leaning third-act catalog. They may be number two, but they try harder.