I'd check on who's going to maintain and service the boiler in the future. Personally I've seen hundreds if not thousands of boilers installed that easily lasted through the 1-year warranty period. Then 2 or 3 years into use, they needed a service repair and couldn't find a tech with the knowledge to service the unit. Used to do work for a manufacturer and I can't tell you how many times I was referred calls from them and when I got to the home and the door opened, I identified myself (like they couldn't read the truck ads?) and the first response from the client was "Thank goodness I finally found someone who knows how to work on this boiler". There's a lot of people willing to take your money for the install and they might in fact do a great install. But who's going to be there when you do need service? That's the most overlooked question in the industry, IMO. As a side bar, in our state there's a world of difference between the installations done by a plumber and those done by a heating company. Two different animals. Most plumbers in our state put "...& Heating" on their trucks just to get the installs and they NEVER have to live with what they've installed. In fact, around here if it's a new gas pipe, the gas company will pick up the 1-year of warranty. The installingn plumber is done as soon as he cashes your check. As you can probably tell, that's a sore point with the techs at our company. We know what we need to do (all the isolation valve suggestions for example) to make the job a good one at the start and forever, for the life of the equipment. But we constantlly battle with the low ball bidder who's installing the same equipment to a lower standard and will never be the one to maintain or service it. LIke the military pilots say, "Check your Six".
If YOU want change, YOU have to first change.
If you are waiting for the 'other guy' to change first, just remember, you're the 'other guy's' other guy. To continue to expect real change when you keep acting the same way as always, is folly. Won't happen. Real change will only happen when a majority of the people change the way they vote!