Meshuggah: "Break Those Bones Whose Sinews Gave It Motion"
Meshuggah are the Tool of extreme metal. They may not be as accessible to the average modern rock radio junkie, but they come from a similar ethos of mixing moody, progressive riffs with deliberately off-putting, fragmented time signatures. Hopefully the guys in 'shuggah don't decide that they need their own analog to A Perfect Circle to vent their more mainstream (read: sellout) predilections.
By the way, this video sucks. Just listen to the tune and shut the fuck up.