I have always had a stove since I was in my early 20's, steel, cast, Jotuls, Vermont Castings, other off brands. One day a friend of mine said he has a friend who just got a job at Hearthstone and had factory seconds (chipped enamel). So I bought a Phoenix soapstone. I would never go back to cast or steel. What's interesting is Woodstock Steel stoves have internal soapstone. I'm curious about that.Only if you never have used a soapstone stove! Spend some time around one, you will like it!

Don't be surprise if you go out in cold weather and see a number of small, furry animals clinging to the side of your house in that area.
Seriously, I don't think you'll have much trouble regulating the heat, and as others have said, you may end up running the stove a lot more than you now think you might. If the PH anything like my little Keystone, if I don't open up the air a bit at the end of the burn, it will run for hours and hours on those coals holding a STT of about 250, which will maintain a level room temp in average conditions here.