Been using a Garmin 60csx (discontinued handheld chartplotter) and paper in and around Casco Bay for the past 5 years. This combo has served me very well in all conditions. I'm not a "bells and whistles" type (probably because I don't have the coin) so this GPS has provided all the info and routing utilities needed.
Still available via retail, for around $200. Then you'll need the charts.
Southern Cross 31
"If you are lucky to live by the sea, you are lucky enough"