I've seen Anvil live twice since this movie came out. They put on a great show. A few years ago I saw Megadeth with Motorhead which was great, and I'm going to see Iron Maiden in a few weeks.
I don't own many albums but I download a ton of metal.
Black Sabbath, Metallica, Slayer, Motorhead, Judas Priest, Saxon, Iron Maiden, Trivium, Venom, Anvil, Megadeth, Anthrax, Kittie, Annihilator, Vovoid, Rise of Dissension, Exciter are some of my favorites.