I like the move. Harper adds depth to the secondary. While he isn't Nate Clements, he is a veteran who has a Super Bowl ring. Another advantage we have talked about here is that he has played against Peyton Manning in practice for the last 6 seasons. The Titans mentioned last year that having David Thornton on the defense helped because of his knowledge of the Colts offense. Any move that makes the Titans stronger and the Colts weaker is a great move.