So most people know of and like the song 'Such Great Heights' by The Postal Service.
http://www.youtube.com/watch?v=0wrsZog8qXg&ob=av3e
There are some really good covers of it, ie Iron and Wine and Streetlight Manifesto among others.
http://www.youtube.com/watch?v=EKGHkBComjM
http://www.youtube.com/watch?v=i_6KTZgayxg
Others, like Christcore band Confide, miss the mark.
http://www.youtube.com/watch?v=GncK6IuY8OA
(secretly I still like it, the chorus is passible)