Boiler and DHW heating recommendations

Greetings

Back in 2008, I placed a post here on Heating Help for recommendations on a gas boiler and DHW heating system. We have a 1950’s house located on the coast of western Canada (very close to Seattle). Our house has two floors. We have a basement suite with a single bedroom, with bath and ensuite laundry, and then our living area which has three bedrooms, a single bathroom, and additional laundry room. The house was always heated by hydronic heating but was originally heated by this old Freddy Kruger style oil boiler. The radiators were these finned baseboard heaters with a giant cage around them. In 2008, as part of recommendations from folks on this forum, we installed a Triangle Tube boiler and a Bradford White indirect hot water heater. About five years ago, we also replaced all the finned radiators with Myson and Stelrad panel radiators. There are no zones, only a single thermostat for the whole house.

This setup has been pretty much bullet proof since it was installed. We haven’t had any issues. We have ample DHW for both our tenants in our basement suite as well as my wife and I. We have never run out of hot water. Due to the age of the system, we are wanting to look at replacing both the boiler and the indirect hot water heater. My understanding is that Triangle Tube has gone out of business, so getting a replacement TT boiler is out of the question. I hear Canada manufactures two different boiler systems, NTI and IBC. With the whole tariff thing, I am curious if it would make better sense to purchase a Canadian manufactured boiler. It seems like a lot of installers like NTI, but there are certainly a lot of bad reviews on NTI’s Google profile. Same thing with IBC. Should we be looking at Navien or Viessmann? Also, does it make sense to stick with an indirect hot water tank, or are combo systems better now? Ideally, we select a boiler and DHW system that is as trouble free as the Triangle Tube boiler has been. I would appreciate any suggestions.