Bobbie, Some of the Garmin models use a removable memory chip. You can buy the Garmin Bluecharts on a chip preprogrammed from Garmin with what ever maps you desire. That may be cheaper than buying the CD version. And speaking of cheap, there is always e-Bay. You can also buy chips from third parties with your choice of maps that they program as a service to you. West Marine and others do this. I recently purchased a Garmin 238 GPS-Sounder which is a B&W unit on closeout. It has a huge screen. Rather than a map, I bought the Points of Interest CD ($50 for the US). It includes highway exit information and marine aids to navigation. I think the maps are too cluttered and slow - and expensive :). I also think you still have to have a chart for the times the GPS does not work. Like Clarence, I wanted something that would serve multiple forms of transportation. While the nomenclature may be confusing as Doug pointed out, the non-handheld models seem to display the information with a wider selection of symbols in more of a chart-like format. I checked out the amp draw of a number of models and they all seem to be comparable, and much less than those of a few years past. There is a lot of neat stuff out there. steve Steve R. M-15 #119 Lexington, KY