I really recommend taking a ride and trying out the coal before you buy. Largest sizes (softball+) are best with lowest coke button and ash % you can get. Call around, get the proximate analysis of the coal and post it here, and ask about storage abilty of coal, they'll tell you. Some subbit coal doesn't store well, it tends to want to turn to powder after a short while, a few subbits have been known to store ok. Lignite lumps tend to burn very well in hand-fired stoves, often with less soot and fine tuning than subbit or bit coal, but the energy density is low, and you're far enough west that it's harder to find. Whatever you do, make sure you have at LEAST an 8" flue and 8" outlet on the appliance. If your house has a basement a prill, stokermatic, or other forced-air underfeed stoker furnace that burns stoker coal is an excellent choice.