http://www.stormcam.org/gps-marine/
what’s the best marine chartplotter gps in terms of accuracy, ease of use, upgrade options and best price?
I have to agree, I use many types of electronics doing boat deliveries and my favorite is the Raymaine series. They have the C, E, and now the G series in up to 12 inch displays. They are very user friendly and accurate. One display can show up to 4 different things at one time, like a chartplotter, a depth finder, radar and other things that you can hook up including a forward looking infrared for night use. Very user friendly and intuitive. Northstar makes great unit also but I find its not as easy to use and the display is not as good as the Ray unit (my opinion).
GPSMAP 640 Marine and Street Navigation GPS