I like the Woodstock ideal steel but it would have some draw backs if installed in the current fire place, in order to meet the clearances of the mantle, the stove would have to be the short leg kit, and installed totally outside the current fireplace foot print. A short leg kit would be needed because you need to have the proper horizontal pitch of your black pipe (double wall needed due to same clearance issues) so it can "drain" any liquid creosote back into the stove in the event that it forms.
The mantle has me nervous because you don't wanna lose it, its probably a hand crafted piece using old growth wood and that simply cant be replaced, the sides of the stove would need the 19" on either side of clearance, so the unit would have to be installed further out into the room to clear the lowest portion of the mantles vertical columns, the top piece of the mantle would be fine since there would be a rear heat shield and the stove would be further into the room.
The hearth would have to be extend out, 16" past the loading door and 6" on the sides, it would need a K factor of .41 so 2 layers of cement board then a tile of choice, or a layer of classic brick which is common for New England.
As far as heat output, you'll be fine, the stove is a radiant stove, that has the choice of running lower in cat mode or full bore with both the cat and secondary re-burn tubes at up to 110,000 btu's an hour, for an old leaky house you may want to have that kind of fire power.
Heat transfer to the second floor seems a little more tricky, you may want to invest in a thru wall vent fan and install near the ceiling with the exhaust pointed at the stair way so more heat can go up the stairs, those fans are fairly quiet and can have multiple adjustable settings.
As far as the other stoves in the line up, I'm not to thrilled with them since there outputs are pretty high and to maintain a clean burn you would have to burn them pretty hot, so either you would chase the heat curve by loading smaller loads with shorter burn times to keep a lower consistent temp or load it up and open a window.