Although I'm a fan of the Kingdom Hearts franchise I haven't looked into this new title.. at all, so I don't know anything about it.

As for Final Fantasy XIII, I'm, so far, intruiged by the fact that they'll make two games.. one that is more actiony (Final Fantasy versus XIII) and one that is more like a traditional RPG (Final Fantasy XIII). So far nothing is really known about the games, but I've seen some trailers for both of them and they look absolutely beautiful. Even the in-game stuff I've seen from Final Fantasy XIII is breathtaking, and this White Engine they've created for the game is supposedly very powerful. Also, the gameplay seems cool, but also rather confusing.. but, we'll see when it comes out.

... and I've never played a Tales of Symphonia game before, so...