Final Fantasy XIII or Tales of Xillia (Please no spoilers!)

I've been "RPGing" for over 25 years. However, it was only recently that I found a little gem called, "Xenoblade Chronicles." Wow, what a game! I'm thorough with that one and am looking for a PS3 title. I've played all the FF games except 13 and I have played several "Tales of" games. Which game in your opinion should I play? Thanks!