On my sail boat ( Pacific Seacraft 37 ) I have the standard cockpit bulkhead mounted spirit compass (very nice to look at by the way, and I use it constantly), and an Airmar H2183 solid state compass, integrated into the N2K network, providing data for the MFDs and the autopilot.
On my, new to me, Krogen 39, I intend to use, not only the standard spirit compass located at the helm, but, integrated into the N2K network, an Airmar 220WX, mounted on the mast, which includes essentially the H2183 electronic compass as part of it's features (beside WX stuff, and a current technology GPS sensor, 10HZ, WAAS, etc.,).