Topic creator, I think the right word is "Instrumental" "What is your favorite opening\ inturrupting instrumental?"
Anyway,. Surreal has good opening and ending piano. Who..is also very well done, not only in the beginning but in the middle. Endless Sorrow has a nice ending piano.
and finally, Voyage has an AWESOME orchestra in the beginning and a little into the middle. They should have kept that for the whole song, but in the main inturrupting instrumental they didn't.
EDIT: Ever Free has sort of haunting but comforting instrumentals. Nice atmosphere.