Whatever the MusicChoice digital Metal channel is playing. This can range from Iced Earth to Mercenary to Slayer to Dimmu Borgir.
The what? Where?
It's carried by Comcast cable, and maybe other providers as well. It's great for the depth of what they play, and also for their clear devotion to the genre -- they actually mentioned ProgPower two years ago in one of their on-screen blurbs, without any recompense.