Looking at the Garmin 18" 4KW either high def or non high def radar to go with the 4208 chartplotter/radar (vs the raymarine c80 package). It is on a stern pole on my Freedom 38. Presently coastal cruising Rhode Island with plans for trip to Maine this summer. Hoping for a trip to the Virgin Islands winter 2011 or 2012. Either way, would put at helm, and have 8-8.5 in screen. Any help is appreciated, preferably by midnight to change the order for the Defender sale (visited there 3x this week).