If the inevitable — and oh-so-appropriate, frankly — comparisons to Rush throw you off, well, that’s just your loss. Those in the know — and they are legion, across the U.S. and as far away as Japan — know that New York’s Coheed and Cambria’s heady mix of prog-rock, metal and emo makes for one of the most exciting chapters in today’s modern rock scene. Masters of the tricky art of the narrative concept album, C&C have made the jump from indie to major label (Columbia) without compromising their a...