You should look out for the PS3 version of Tales of Vesperia, it will have a lot more content than the 360 version. http://www.vgchartz.com/forum/thread.php?id=67047&page=1
There is also a new Ratchet & Clank coming, along with Uncharted 2, and Demon's Souls along with White Knight Chronicles are destined for western releases. Eurogamer gave Demon's Souls a 9/10 (http://www.eurogamer.net/articles/demons-souls-review) and the asian version has full english support, so you can import if you like.
EDIT: And I forgot to mention (and even though it is already released, I have to make sure you get it) Flower. Go buy it, no matter how unmanly the game's name might make you feel.
EDITEDIT: And you should look into Trine. It releases on PC also, but playing coop with your buddies should be done in a couch with a controller each 
