I am not joking when I post this, but it really should be the most listened to or favorite recording in your collection. I find it is the easiest way to tune a room, especially if you have adjustable components, because in your mind you have a sound you most identify with. I myself have a personal favorite, Paul Kelly's May 1992, which has a great soundstage, silence and decay, and pure, isolated instruments. I also use Radiohead's Amnesiac, which has many moody and difficult to reproduce tracks. Just my POV. I think a hi fi system comes alive when you know of a recording for a decade, it has been a soundtrack to your life, and it comes alive into another dimension or nuance. That is what keeps me loving music, not some analytical CD that proposes that it can recreate a "depth of image."