When it comes to handheld GPS devices, the Lowrance Endura Sierra is just about as good as it gets. It comes with a barometric altimeter, tri-axial compass, 4 GB of internal memory and a high resolution 2.7″ touch screen. It comes fully loaded with topographic outdoor maps, meaning you’re not limited to the roads like in your car GPS. The Hot Key buttons are a nice feature too, allowing you access main features quickly. As a nice bonus, it features a micro SD expansion slot supporting up to an additional 32GB of storage for pictures and MP3 audio files. There’s no infestation Hot Spots in their customizable map content yet, but hopefully some of their users will be up to the task when the time comes along.