I currently have a century insert that I'm not happy with. I was looking at the blaze king insert vs a quadrafire voyager 2 free standing in front of the fireplace. I own a 1700 square feet house and not sure if the max 39000 btu's is enough. It looks like the voyager is capable of 60000 btu's if it needed to. The only thing holding me back from the voyager is I will need to extend my raised brick hearth. Any ideas?