Hello Greentree, welcome to the forum.. If you want to keep the house warm, you can get by with a stoker stove where the wood burner is now. A stoker stove with a thermostat will keep your heated areas at a steady temperature if the hot air distribution is reasonably good.. One of the problems with your wood heat is that it needs tending every few hours to keep the fire going.. With a stoker stove, it will run 24+ hours with minor tending.. just fill the coal hopper and empty the ashpan. If you have a STEADY heat source, the whole house will be warmer,, with your current up and down heating with the wood stove, the house never stablilizes, which is uncomfortable.
If you you want to go with the best system, I'd go with a stoker boiler, use it for heating your domestic hot water, and using a water-to-air heat exchanger, heat the hot air for your ductwork,, this system would be the very best, but will cost probably twice to 3x the cost of the above stoker stove. But these boilers can, depending on which one you install go for days without tending,, and provide unlimited hot water.. and the boiler can be used all summer long to heat hot water for a very reasonable cost as well..
You live west of Harrisburg, so if you want to provide your own coal, you are about 1.5-2 hours from the mines and breakers on I-81, so you could get your own coal if you have access to a truck/trailer.
Hope this helps answer some of your questions.. Greg L