new house, gas or electric
Do consider a dual fuel heat pump / gas furnace arrangement.
This will prbably be a more expensive option than other arrangements but one worth considering none the less.
The heat pump will probably take care of you most of the time with the gas furnace being available for those really cold spells. Additionally, alot of people, especially the better half like the "feel" of the warmer air provided by the gas furnace especially when the temps are in the teens!
Be careful though and have a good talk with your HVAC contractor about the set point for the transfer from HP/Gas furnace or you'll see most of your energy savings go up the flue. Come Summer you'll really enjoy those lower utility bills that a HP can provide.