I much prefer the William Orbit original electo version of Adagio for Strings.
There again, the classical version is stunning as well, I will always remember seeing it being played on TV live from the Last Night at the Proms as a tribute to those who lost their lives in the World Trade Centre attack in 2001.It was also used in the very moving scene in the film Platoon when Willam Defoe's character gets killed.
Im with you on the Orbit version, its got a much happier tone to it over all i think. Tiesto`s version just depresses me.