Need Advice

Hello All, I currently have an electric boiler, yes you read that right, feeding copper fin throughout my home. Home is about 1600 sq ft, lots of loss due to old windows that will eventually be replaced, talking 3 years down the road. So you can imagine, electric bills are very high. I am converting to gas and am getting all sorts of conflicting advice from contractors. Two contractors rated the house at ~83k. The other contractor did not perform a rating. Contractor #1: Go with high efficiency Elite FT80 (79MBH), Triangle Tube 40gal Indirect water heater w/ outdoor reset control. $$$$$ Contractor #2: He states to not go with high efficiency or indirect water or outdoor reset control, not worth it. He suggests Crown Aruba 4 AWR140 cast iron boiler (102MBH) with a separate conventional 50gal gas water heater. $$$