I've only just scanned this thread, but I saw no mention of The World Ends With You. Amazing jRPG and definitely my handheld RPG of the generation.
Console-wise, Xenoblade Chronicles is my pick.
and the music:
http://www.youtube.com/watch?v=xweRl4LZlmo
http://www.youtube.com/watch?v=HAW4xlbyu28
http://www.youtube.com/watch?v=9BvWPzAg8Ig
http://www.youtube.com/watch?v=p45gdP2OKmU
Multiple people, myself included, actually mentioned The World Ends With You. Great game.
Also on Xenoblade, for the "heavier" side of the music.
http://www.youtube.com/watch?v=JS7XVMNNZI8
http://www.youtube.com/watch?v=HAW4xlbyu28
http://www.youtube.com/watch?v=nCclUgQk1Lk
Really nice ost.