Looking to get a new BK to heat my 2500 sq. ft. ''A'' frame house. Stove is located in the finished basement (old school 70's wood paneling) and the house has an open floor plan with 2nd story being a loft. Current stove is a non-cat 3 cubic ft. fire box and does a decent job but it's cheaply made and I'm sick of baby sitting it. I'm stuck with a 6'' chimney liner,so my question is, do I go for more efficient fire box of Sirocco/Ashford or get the larger(by 1/10th of a cubic ft.) fire box of the Princess? Also, is the new Ashford just a Sirocco 30 fire box wrapped in cast iron? THX in advance....D