I find some of the tracks from Throssel Hole monastery to be truly wonderful - especially the sung ones.
Their morning service: http://throssel.org.uk/morning-service-backing-tracks/
Additional liturgy: http://throssel.org.uk/daily-scriptures/
Is anyone aware of other beautiful sung liturgy/scriptures or chants? Personally, I'm not much of a chanting fan, but others certainly will be.