Depends on what style of RPGs you like.
If you prefer more action based, then get Tales of Vesperia and Infinite Undiscovery, as they should both be head & shoulders above Eternal Sonata.
If I was to rate the current Xbox 360 Library of Western and Eastern JRPGs, I'd put them in this order:
Japanese:
Lost Odyssey
Blue Dragon
Culdcept Saga
Eternal Sonata
Kingdom Under Fire: Circle of Doom
Enchanted Arms
Phantasy Star Universe
Western:
Mass Effect
Oblivion (could be switched with ME if you prefer longer RPG experiences)
Marvel: Ultimate Alliance
.
..
Two Worlds
I can't think of any other WRPGs on the X360 at the moment. It really depends on your preference. If you like Action based JRPGs, then Eternal Sonata could rank higher, but the game has a confusing story, and the combat system is shallow.
Personally, I'd go for the trifeca of RPG awesomeness with Lost Odyssey, Tales of Vesperia, and Mass Effect - You'd be getting the cream of the major RPG types.
Back from the dead, I'm afraid.
