Movie sound clips/ Music

Where could I find audio clips from movies, quotes and what not?

Also do you guys know of any other music that sounds similair to these:
One Winged Angel, The FFVIII theme, E.S. Posthumus - Pomeii, I really like the sound of these, and I wanted to see if there were any other pieces of music out there like the these. Artists or specific songs will do.

Thanks
Grei -