You want it to provide dependable heating comfort at an affordable price for a good many years to come. Yet you don't want to spend a fortune. That's why your best choice is a BC series cast iron, oil-fired boiler. Not only is it moderately priced, just slightly more than the typical steel boiler, it's made of cast iron. And that makes all the difference when it comes to performance.
Cast iron is stronger, wears better, and lasts longer than steel.
A properly maintained and serviced Utica cast iron boiler can not surprisingly still be running strong after 50 years of service.