Have been using a Garman 48 for about 6 years now while sailing...

The unit itself is no longer available from Garman, but at one point when I had internal memory problems, Garman fixed it for free.

Having looked at and used a number of GPSs on various boats, I have come to the conclusion that Garman is #1... both for signal aquisition and for UI.

I recently looked at some of their etrex units and am thinking about picking up one of those... for portability and maping capibility. One thing I have noticed is that color is overrated. Contrast in bright sun and long battery life are more important.