Not sure about your budget and room size but for double drum bass and heavy metal guitar riffs you cannot go wrong with the GoldenEar Triton Two tower speakers provided the room is big enough to handle the bass.
What is the best HEAVY METAL speaker?
I know totally blasphemy question here on Audiogon. But you like what you like, right? Anyway, I know most metal music is totally compressed and recorded horrible (aka Metallica) however there is a new age of metal bands out there that are starting to change that (Opeth started with Blackwater Park). So what speakers out there can take the pounding of a double bass drum kit hitting at full throttle and give the roar of metal guitar justice. There has to be a set up that would make Glen Tipton turn his head and say hell ya!