Another vote for Garmin...
Here's another vote for a Garmin chartplotter, and their BlueChart CD. Getting the charts on CD lets you use them on your PC. Garmin has established a reputation for "Apple Macintosh" ease of use, as well as excellent customer service.I recommend getting one that has two COM ports so that one can be set for the Garmin protocol to communicate with a notebook computer in the cabin and one set for NMEA to communicate with VHF, autopilot, etc.We have mounts and wiring for our 178C with internal antenna on both our Whaler and MacGregor, and on the latter, we also have a power cable in the cabin, so we can run the unit all night with the anchor alarm on. This model's internal antenna picks up as many satellites in the MacGregor cabin as it does in the cockpit, but I've heard this isn't the case with the internal antenna on the 176/276 unit.If you want to "Go To" a waypoint press the Nav button, select "Go To" and choose the waypoint from two lists. One is waypoints alphabetically and the other from nearest to furthest away.No electronics are a substitute for paper charts. When out of sight of land or in reduced visibility, use a paper chart and plot a fix hourly and at every course and speed change. OTOH, in a narrow channel, especially on a dark and/or stormy night, having someone at a chart table or PC below shouting up steering directions is no substitute for a good, weatherproof chartplotting GPS at the helm!