So i stopped by Burerdus here in Londonderry NH today. Get company and people. They are more then happy to show you around, look at all of the boilers they offer (all of which are installed and working) Talked with an instructor who was great. Showed me the guts of the GB142 all broken down, showed me some HXs that failed due to intake and exhaust mixing (apparently 80% of there tech calls end in incorrect venting). The instructor said people are more then welcome to attend there classes and such.
There service alone makes me think of going that route.