This is a pretty old song, but I had to give my 2 cents. I came upon this song by accident. I was trying to get the FF7 ROBOVoice (my friend love funny stuff like it), and when I saw they had a torrent, I went "cool! I can get this song straight quick." I quickly realized that it was half of the entire repository, but I decided to keep on it. I waited until a song finished dling, and the first one was Terra in Black... to think I might've never heard this if it hadn't dled so quickly.
The way I describe this song is beautifully powerful. One of those songs you can close your eyes to and just feel the music. I haven't listened extensively (if at all) to the bands that Andricon compared this song to, but it really reminds me of is Trans-Siberian Orchestra, with teh soft instrumental going into electric guitar. Bravo, Ailsean. Now, to get my hands on a copy of FF6.