If you want to know what the safety course is all about checkout
http://www.robinsonheli.com/training.htm which gives you a full rundown on what is studied during the course.
Your flight time is perfect for the course. A large proportion you will find having less flight time than yourself as many in the US do the course between their private and CFI licences.
Don't hesitate about doing the course it will make you more aware whichever of the three types you mentioned you fly.
Edited so that Lu doesn't correct my grammar!!
[ 24 October 2001: Message edited by: Rotorbike ]