Doomsday soundtrack by Murray Gold is awesome!
Was mesmerized while this soundtrack played during the doomsday episode of Doctor Who between 36:42 and 38:40. It's a heart-wrecking tune that way. The 5+ minutes edition which, even though not that effective, is still recommended for listening. You can get it from here - http://beemp3.com/download.php?file=4526040&song=Doomsday