The battle system in Grandia 3 is probably the best element in the game, could actually play the game all day because of it. Story...well nay and that's why there isn't any more sequels to the series. I'm hoping some game (most likely a spiritual successor) uses a Grandia battle system, albeit combining the best elements in the three Grandia games. Like using a battle system in 3, but modified (bad changes be damn), great story from 1 (and probably 2 too), etc.
Haven't played 1 and 2, not sure if it's available via PSN or some other place. (Can anyone fill me in?)