The main problem with the US Stove products is, as stated above, they are wood burners first, and a coal burner second.. Go to the many coal burning stove sites, and look at the design of the firebox.. For coal you want a firebox with near vertical sides, a deep firebox with nothing but shaker grates on the bottom..
Most of the US stove products have a 'V' shaped firebox that is not very deep.. coal needs to be 8-10" deep in a furnace the size you are looking at..
The US stove product that looks closest to being a good coal burner are the Clayton brand,, the sides are nearly vertical, and the grates large.. Compare to the Harman hand feed furnaces and boilers..
With a really good chimney like you describe you have, and a barometric damper, you may have good luck with one of these stoves.. but it will require some learning and they often are finicky.. Most made for coal stoves are light it and feed it, empty the ashpan and that's it..
There are several forum members who have spend lots of time and effort to redesign a US stove product or have given up on them and bought a made-for-coal product..
To me buying a US stove product is a gamble,, about 50/50 that you will have good luck with it.. If you were asking about buying a Hitzer, Keystoker, Harman, Baker, NewYorker furnace or stove,, I'd say you are about 98% likely to have good luck with it..
Hope this helps.. Greg L.