A favorite is “The Pocket Watch”.
http://www.youtube.com/watch?v=7tiTzQoEWDw
The back story of the pocket watch drives the movie For A Few Dollars More, and is one of tragedy and revenge. The watch itself is used to time duels between antagonists. When the watch stops, the shooting begins.
Which makes it perfect for a ringtone.
His music, Clint Eastwood and the other cast members made those spaghetti westerns a lot of fun.