I am presently happy with my alpha numeric keypad gps and paper
charts, but I am considering an upgrade to a chart plotter.

Marc, are you looking for a "serious" unit or a handheld such as the 76s from
Garmin. There is nothing wrong with charts and your old unit, BTW.
When we take possession of the new boat, we're installing a unit that has
radar/GPS/Charplotter, which I feel makes sense against stand-alone units. They
are no longer expensive.

RB