Such a coinkydink you posting this, I was just playing my CD of Lucia di Lammermoor last night...the one with Caballe and Carreras. My favorite part though is in the Act 1 finale "Sulla tomba che rinserrra"
Mark, if you're an opera/classical fan I can't stress enough a CD you should get if you don't already have it. Emma Kirkby singing Mozarts Exsultate Jubilate. No one can or has sung it better. It's on the L' Oiseau Lyre label and I think it might still be available though it's been about 15 years or more.