I'm looking for a Radar/Chartplotter/GPS(WAAS) and found a JRC 1800 for $1500. This is $1000 less than a Furuno, $1200 less than Ray and $1600 less than Garmin. Too good to be true???? Can they make a good unit for that much less than everyone else? The only function that I can find that the JRC doesn't have is being able to overlay the radar on the chart, but they do have split screen capability. Any thoughts? http://www.boatersland.com/jrcra18cora.html