Let's lay out some stipulations for this thread:
1: "Radio Metal" is not METAL. This includes Slipknot, Korn, Nickelback, 3 Days Grace, Disturbed, Saliva, Rob Zombie, Drowning Pool, Breaking Benjamin and others currently garnering Billboard Radio station-mainstream play. Notable exceptions include the band below.
2: Metallica stopped playing metal past ..And Justice For All. Everything except for Death Magnetic. post-..AJ4A is crap.
3: Slipknot are NOT hardcore or "Extreme". They're nu-metal shit, nothing else.
4: Slipknot is NOT "Death Metal" as MTV likes to pretend they are. They're "False Metal", nothing better.