Hello Brian, welcome to the forum..
Personally I would recommend a boiler over the forced air furnace.. A boiler will store heat from the coal fire, and a boiler will heat your domestic hot water as well.. A boiler can be hooked up with a water-to-air heat exchanger that is installed in your hot air duct just above the existing furnace.. And you can use either a water/water heat exchanger [plate exchanger] to heat the cold water entering your hot water heater, or use an indirect hot water heater with the boiler. A really big plus [if it were my home] is that with a boiler, you can add under floor radiant heat piping on the main floor from the basement side, and have hydronicly heated floors on the first floor.. this is the very best heat system there is.. warm feet=warm body, without 'roasted air' being blown around the house.
As for a coal burning stove: With a 3300 sqft house [does that include the basement? ] you need a pretty substantial stove if you want to keep the existing heat from running.. Stoves are supplemental heaters,, they usually do a very good job of supplementing your heat,, but won't support the whole house when the temps are real cold or if your home's layout is not good for heat distribution. You could put in a LL Hyfire II, and use the ductwork options to distribute the heat, or like you mentioned a large stove in the living room/great room.
For the chimney, I highly recommend a masonry chimney,, If you can incorporate one into your home's floorplan, that is the way to go.. Powervents work fine, but they do make some noise, but most importantly, they need periodic maintenance and cleaning.. a masonry chimney is forever, or just about forever, [your great grandkids may want to have it cleaned, coal doesn't leave anything but a little ash, and only on horizontal surfaces]..
$300/ton for bagged Blaschak coal is not too bad,, about right with transportation costs... if you can bring in bulk coal, and store it in a coal bin, then with transportation costs,, good bulk coal can be had in your area for around ~200-220/ton.
Email Leisureline about a dealer in Ohio, they may have one near you. For a boiler,,I'd consider a refurbished EFM, look in the items for sale forum, 'scraper 23' is an EFM rebuilder,, he had an EFM 350 for sale,, PM him to get on his waiting list or to ask questions. EFM's use a remote coal hopper, some folks use a plastic 55 gallon barrel, this holds about 3-400# of rice coal.
Hope this helps.. Greg L