Replacing gas boiler

I'm in the process of having to buy a new gas boiler. Keyspan, in my neck of the woods is making an offer of $500 towards an update of old boiler...$599 if converting from oil to gas. I had a plumber to get an estimate from him. I live in a single family home, but it has 2 levels ( often mistaken as a 2 family ) and 3 convection radiators on the first level and 3 old fashioned steel radaitors upstairs. My btu now is 130000. The plumber said that I could use around the same output or up to 140000 btus. The cost would be 3800 with labor...minus the $500 from Keyspan. Is this a good deal? BTW, the old boiler isover 30 years old. I also have a 40 gallon water tank. The plumber gave me an estimate for a new water heater for $800 including labor. My water heater was installed in 1989, and it has shown no problems and no leaks. Keyspan in their offer of $500 or a new gas water heater for 40-to 50 gallons, excluding installation, which the plumber said he would do for $200. Now, I'm torn between getting the $500 rebate or new water heater. The plumber estimated to replace my water heater for $800 including installation. Am I wrong towards leaning for the water heater? Would appreciate some input. BTW, I live in Brooklyn,NY

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Site Timeline is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.