Thank you all for your responses. And I'm sorry I didn't get back to this sooner. We lost power Friday night just after 9pm - in the nasty storms that went through. Just got it back 20 minutes ago.

We talked at length about the heat pump, and have decided that is not the way to go for us. We have a well insulated house, and generally keep the winter temp no higher than 64°. We heat with propane and I tallied up the cost of that for the past 10 years, and it would take us forever to make up the cost of the pump.

So we will stick with a high efficiency furnace