Either that or pick up a used PS3. In my estimation it is worth it simply for those three games.
Tales of Vesperia came out on the 360. It is worth playing as well.
Some people just didn't like the story of Graces f. For me it was a story of profound redemption. I actually cried during the last arc of the story. Most tales stories have three arcs. You get a bit of a prequel, then the main story, followed by an after story, bonus after the boss stuff is done. Mr Oreo didn't even realize the game had a third part that was almost as long as the original story the first time he played. It is now his favorite of the games as well.
The weapons system was awesome once you figure out how to merge gems. Side note, some things are carried over in all the games like the items used for healing and such, so you don't have to relearn those. I like that aspect too. An apple gel in one story does the same thing in all the games.
If you like the skits, this one is perfection: Linked because of character ages
Yes, Millia is a demi god. You can play through the game and get her side of the story or you can play through as the medical student. It makes for great replayability. Xillia 2 can be played as a stand alone, but it is a great follow up to the original story as well since they bring back all the characters you grew to love.