I like the original, and I usually can't stand when somebody covers a "classic" in a different genre, and I most especially wouldn't have thought this would be any good at all, but somehow, it's just freakin' awesome. Listen to it on some good speakers, and turn them up a bit.
The Sound of Silence, covered by Disturbed. youtube.com


The Sound of Silence, covered by Bobaflex youtu.be