The Garmin Foretrex 201 is a great little GPS unit with user customisable displays
I have this unit, too. I strapped it to the rear beam of my Boyer Mk4 (previous boat) on the right side. When sailing on port tack, I guess it got hit with a bunch of pressurized water at speed. Water got into the display, and I couldn't read the display for a week. Then it dried out and started working again.