I can get the Scala rider set (2) for $178 on amazon and the comparable chatterbox (1) for the same or more. Is it worth the extra money to get the chatterbox? I ride with a few friends who have chatterbox. Will the Scala talk to them? Do you know if Scala will play music from iPhone over Bluetooth? I ride with my wife on back and it would be nice to talk to her. Thanks!