The PS2 bloc only includes Final Fantasy X, Final Fantasy X-2, Final Fantasy XI, and Final Fantasy XII. Take out FFXI because it is an MMO (although I think it is awesome) and take out FFX-2 because it was pretty bad and you only have FFX and FFXII to really look at.
Of those two I would but FFX higher than FFXII. I liked both of them and I have very very fond nightmares of 2 hours of micromanaging the battle with Gilgamesh in FFXII (seriously I was about 35 levels too low to fight him), but I just think FFX is a better game over all.
Final Fantasy game with 3 female protagonist ...
Final Fantasy IV: Rosa, Rydia, Porom
Final Fantasy V: Lenna, Krile, Faris (... arrgh!)
Final Fantasy VII: Tifa, Aerith, Yuffie
Final Fantasy VI: Terra, Celes, Relm
Final Fantasy VII: Rinoa, Quistis, Selphie
Final Fantasy IX: Garnet, Freya, Eiko, Quina (maybe?)
Final Fantasy X: Yuna, Lulu, Rikku
Final Fantasy X-2: Yuna, Paine, Rikku (<-- Probably the one you are thinking of)
Final Fantasy XII: Ashe, Penelo, Fran
Final Fantasy XIII: Lightning, Vanille, Fang
(ya know I didn't realize women came in threes in Final Fantasy games until now)