I'm running a Raymarine system also and am pleased with its performance. Its a c-80 multifunction display with DSM300 digital sounder module, RS125 gps sensor and Radar w/ RD218 2kw Radome. We basically boat year round "inside" and offshore... mostly westcoast Vancouver Isl. and spend time exploring new territories...and of course, sometimes in pretty lousy conditions... DId over 100 hrs since I got the boat in March and I'm pretty impressed with its performance. By the way, after I did my homework I bought the package last Feb at the boat show in Vancouver... by far the best deal I could find.
Good luck in your search ALK...