Here is another cycling computer that lets you monitor and improve your performance. The Garmin Edge 830 is a dynamic performance monitoring tool that gives you insights on your VO2 max, recovery, training load focus, heat, altitude acclimation, nutrition, and hydration. It includes the Garmin Cycle Map to help you ride like a local.
You can customize this bike computer with an app. The battery lasts up to 20 hours with GPS.