The only thing I like about Billy Idol is that he was great in the Wedding Singer. He played at Download festival 2005, I stayed long enough to see him walk on stage then left.
Anthrax have some great songs, They passed their prime but still got some classic songs like I am the law, madhouse and Antisocial etc.
They are however the weakest of the 4 horsemen of Thrash metal, Megadeth are clearly superior!