I do think IX had the best track, although I love a lot of songs on VIII. I was listening to both OST's and I find IX's to be much more soothing and calming, whereas VIII's were more up tempo and fast.

I found most of VII to be forgettable (I can only name like 3 towns without looking up a map) and that goes for the music as well. The only songs that stand out to me are Sephiroth's theme and the Cosmo Canyon theme, which is an excellent song