I really love classical music. The musical genius of the likes of Tchaikovsky, Liszt, Bach, Strauss et al always moves me. Perhaps it would be better to start with a better known composer, probably the most famous one of all: Mozart. This one is called Requiem and it had a massive impact and is one of the most influential pieces of music in the history of music. Simply put, it's beautiful and it's genius.
Mediafire (pt. 1)
Mediafire (pt. 2)