actually, making a ff music CD is a very good idea. i've actually done it myself, i made 2 ff music CD's and called 'em 'fanal fantasy music' vol. 1 and 2 each with 15 songs on it. and yeah.

anyway i will suggest these:
ff7: boss battle
ff9: boss battle
ff9: kuja trance
ff10: suteki da ne
ff7: on the other side of the mountain
ff6: starting world map music.
ff4: world map

i may as well copied the songs from my ff CD's on to this list. maybe later i will...