Hi everyone.I'm looking to replace my old mw 100 with a used boiler.these are what I'm considering.an older hs tarm excellent condition 900.00 us stove model 500 for 700.00 obo.biasi 3 with everything to hook it up including a modine unit 2000.00 new Yorker that is an 08 model for 2200.00my house is about 1500 sf.the boiler will be stand alone.the biasi is a couple years old.hope that's enough info.I've read great reviews on all.would like opinions on them if possible.