Color Raymarine
I have a color Raymarine 7" display including course computer and sonar on my H356. I have the mast mounted antenna with a guard which helps with the sail wear. I recommend the overlay function with the chart as being the best combination to have. With the overlay, you can compare the chart with actual targets including buoys. I would also get the tracking (Marpha) function if you sail in much traffic as it will track 10 targets and give you great traffic avoidance information (requires course computer). I use it to track barges and can use it to better plan my tacks on KY lake. It will also track rain showers most of the time and with the time to closest approach, gives you a good idea how long it will take for the rain to reach you so you can get into your rain gear. It is also very helpful at night.The points made about the mast mount are good, however, I would be a little concerned about being too near the radar transmitter due to possible health concerns from the microwave radiation. This may not be a concern, but for a former AF pilot, we always stayed as far away from radar as possible.I have a pole mounted KVH sat antenna and it is a great mount - very rigid and would be fine for a radar mount.I've used radar in planes for 35 years, and the Raymarine system is really a good one. SV Persistence