Large for navigation and easier on the budget.
Garmin Edge 530 GPS Cycling Computer and Bike Mount Bundle with Tempered Glass Screen Protector 2-Pack and 16-in-1 Bike Tool Kit (010-02060-00) : Electronics
Review: The Hammerhead Karoo 2 – Above Category
10 features that would improve next-generation GPS bike computers
Stay ahead of the pack with Garmin's Out-front Bike Mount that lets you to take full advantage of your Edge's capabilities without compromising your ride. The mount positions your device for easier monitoring and safety. Also compatible with the Forerunner 910XT and 310XT when used with a quick-release kit (sold separately).
Garmin Edge Out Front Bike Mount
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Review: Hammerhead Karoo is a big, bold GPS cycling computer with a bite - Bikerumor
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Garmin Edge Explore: Everything you ever wanted to know
Garmin Edge Explore 2 computer review - user friendly, well priced with a focus on the journey