I say this as a preface because of the music video under the cut. I've loved Apocalyptica's cover of Metallica's One for years and when I saw this clip of them performing it live I really couldn't resist since I've always joked that they probably caught their cellos on fire playing it and I was curious (and no I didn't really think their cellos caught on fire). While I was somewhat disappointed (remember this is typical of how a live performance affects me when viewed second hand), I would so lay down some serious bucks to see these guys in concert. They're pretty much freaking awesome.
But check them out and enjoy. studio version of the song.
Now if I could just figure out how to mash-ups (I really want to do Apocalyptica's cover of Metallica's Sanitarium)... ho-boy *chuckle* you'd guys would be in trouble. ;)