Final Fantasy needs no introduction when it comes to game soundtracks, as Nobuo Uematsu is probably the best-known video game composer. This was the first FF game where he got some help from other composers, Masashi Hamauzu and Junya Nakano. Overall Final Fantasy X has a nice mix of relaxing and action music, with the opening track 'To Zanarkand' being the defining track for the OST.

There are two editions of the OST, the original one and a remastered one. I think they're both pretty good, and they bring different qualities..the remastered one usually has a fuller sound, but is also a tad more complicated where sometimes the original/simpler version has more impact.

I've included a mix of both version here so you can decide for yourself.