Hello,I plan on updating my electronics before the boat gets launched in the spring. I want to install a mapping GPS / depth sounder. There are many many many to choose from. What are the current thoughts on color vs monochrome? What about display size? I am looking at units from Garmin (GPSMAP 178 Sounder, GPSMAP 178C [color] Sounder), Eagle FishElite 480 and 500C (color), Lowrance M68C S map, Hummingbird, and a few others.The Lowrance is the cheapest at under $400. It's color, but the screen is small (3.5"). From Garmin there is a huge price difference between the 178 mono (under $400) and color (about $700). The Eagle units seem pretty interesting. The mono unit has very high resolution (480 X 480) and a big screen (5"). The street price is about $450. The color unit is only $50 more, but the resolution is much less. Are you confused yet? I am!I'm looking for comments on color vs black and white, and on relative screen sizes.I will be using it for navigating on the Long Island Sound (not terribly difficult) and to 'see' the bottom when anchoring.Does anyone have links to reviews?Any information appreciated.Thanks,Barry