Subject: Normandy beach tours?

We're planning a trip to Normandy this fall, and would like to take a narrated tour of the Normandy beaches. I've "googled," and discovered that there are several firms that provide these tours, and that the museum in Caen does as well. Has anyone taken any of these tours? Is it worth the approximately $100 a person to have a guided tour? We have been to Normandy before, and walked on the beaches and toured the museums, but thought this approach might bring the landing to life for us and our adult children.

Thanks, Dot Allen Silicon Valley -- but leaving in four weeks for Scandinavia!