For reference:
[ame="https://www.youtube.com/watch?v=2rzDKFy3YII"]SACHS Shocks Your Car - the When and Why to Replacing Shocks - YouTube[/ame]
http://www.kyb.com/knowledge-center/...eplace-shocks/
Both Sachs and KYB recommend 50K as an interval for OEM shock replacement. Obviously, they're in the business of selling new shocks, but replacing the OEM dampers at 60-75K is not as early as you'd think it is.