I currently have a Englander 25 pvc stove and would like to upgrade to a boiler eventually. I would still like to be able to use my oil furnace as well for back up. I have baseboard heating so would need to be able to heat my water with it as well. My house is roughly 2000sq foot but has no heat ran into the 2nd floor. and i am also working on a room in the basement. So i would need it capable of running different zones. Thoughts on what kind of boiler and what prices tend to run?