I have been using a Garmin Handheld GPS for Hiking, Skiing and Mountaineering and have been quite happy with it. I just started to shop for a Portable GPS for Motor Vehicular use as my handheld even though it can be adapted for Vehicular use I am not comfortable with the screen size. There seems to be quite the selection for portable devices by quite a few different companies. Any input on what to look for. Thanks ahead of time!