Jam-packed with nifty features, the Lowrance Sierra GPS take the concept of “fully loaded” to a whole new level. Equipped with detailed topographic outdoor maps and content, the Sierra is easy to use, thanks to its simplified touch screen interface and hot key physical buttons that take you straight to the main features. Offering 4GB of internal memory, this Lowrance GPS unit also comes with a micro SD expansion slot, so you’ve got plenty of room for your maps, pictures and MP3 audio files. Other features include Intermap’s Accuterra high-resolution topographic maps, extensive outdoor trail networks and Points of Interest, Fishing Hot Spots and the NAVTEQ road network. Find your way around for about $550. Lowrance.