I have a Panasonic two-line & voice-mail system with three cordless handsets (and charging cradles) - KX-TG2740S I think. It's been going fine for 8 or 9 years now. Obviously I can't speak to their current offerings.

The handsets lose connectivity maybe once every year or two, usually after letting a battery run down or after a long power failure (damned PEPCO).

-jk