Garmin is the best, their customer service is excellent. They quickly address bugs in the units and fix them with SW releases. I'd also recommend something with color, I'm using a 76CS now and color is a huge improvement when viewing topo maps on the unit. I'd also look for one that floats - you never know when it might end up the water. Many of them come with memory to load maps into, 24mb will hold more map than most of us can walk. Mine has 115mb, it holds Idaho and parts of WA/MT I'm liable to wander into.