I've been wearing Bell Sweep helmets for years. I like the super liught weight and airflow. It's time for a new one, and they don't make it anymore. I'm looking at the recently-discontinued Gage and the Overdrive. The Gage is lighter, but I'm wondering if the Overdrive, being newer, has some advantage? Bell seems to present the Gage as a more "advanced" model and the Overdrive as more "entry level." Any experiences?