In Altoona PA I would also be looking at an extra-high efficiency heat pump system. That will provide heating and cooling. If you install a mini-split system like the Mitsubishi Hyper-Heat it can be efficient down to -5F degrees. Moderator pen installed this system last year in PA. Second choice would be a Fujitsu. These units are miserly with electricity. Look in the Green Room or DIY section for more info on them.
https://www.hearth.com/talk/threads/minisplit-ductless-heat-pump.105278/page-2#post-1391846
https://www.hearth.com/talk/threads/impressed-with-the-daikin-ductless-heat-pump.60963/
Timnus - FWIW - I have some friends who went with the mini-split solution ( Fujitsu I believe) a couple years ago. On the colder days they have a small oil stove that keeps them warm, but on the not so frigid days, and during the shoulder seasons (and occasional crappy days in between when they need some easy heat) it works great. And they get air conditioning in the summer which they LOVE. They report the same thing about the unit sipping electricity too. I would have jumped all over one of these myself but I needed a no-freeze solution for the many days we're away, and we get just a bit too cold mid-winter for the heat pumps to work or at least to be very efficient. Once we're full time residents (there to tend the wood stove 24/7), I'm going to likely be looking at these units again.