I had a home built smoke dragon stove that heated 1700 square feet up to 90 degrees in the dead of February. That house leaked air like a sieve, and the stove was not able to be regulated well. Even though the stove had a 6 cubic foot firebox the wood would burn fast, and a few hours after nearly needing to open the window to let in some cool air, the house would be cooling off fast, and cold within four or five hours. We burned full time, primary source of heat, and went through 12 full cords of wood a few winters in a row. Plus 600 gallons of propane.
We replaced it with the largest Pacific Energy stove (EPA rated with secondary burner) and had a much more even heat output - 6 hours between loadings on those bitter cold days. Longer if it was above 10F. It wouldn't cook us out of the house. We used 2/3 of the wood.
Whether you need a different stove or not is up to you, how much wood you burn, the price you pay, and the comfort you seek. It was absolutely the right choice for us.
LOTS of reading on all things woodburning at the Hearth forums.