If you don't know yet.. here are the voice actors for FFX-2
Yuna: Mayuko Aoki
Rikku: Marika Matsumoto
Paine: Megumi Toyoguchi
Bararai: unknown
Gippuru: unknown2
Nuji: unknown3

and if you like to check this website out.. it's square-enix shop
http://www.square-enix.co.jp/shop/