Skyrim's ost are nice. One of the good ones.
Among ps3 games, the game which I found to have the best was Nier.

An ost from Nier: http://www.youtube.com/watch?v=MGtnBnmJ8MA
Most of it were choir + god-made song. It has the best emotional story among all rpg I played. I cried afew times in the course of the story alongside with it's ost.
Unfortunately for gameplay wise, Skyrim is a million times better.