For those interested, I added my top 100 for classical pieces. If you find some good ones I'm missing feel free to comment.
http://www.playlist.com/standalone/25653526
Nice list, thanks. All my favourites are there, and some (many) I didn't know.
If I had to say a composition who is not in the list, I'd say Rimsky Korsakov's "Scherezade" (or Scherezada). I loved that one. As you know he composed "Flight of the bumblebee" too, but I think Scherezade is such a beautiful composition...
Also there is Francis Poulenc (s. XX) with some nice works, specially for wind instruments, who I liked a lot.