Any recommendations for a reliable and efficient combi boiler (for doing domestic hot water, hydronic radiant in-floor heat, and on to an air handler)? We are also thinking we'll use an air source heat pump.

We have had quotes for:
1. HTP versa-Hydro combi 96% efficient with a 55 gal hot water storage
OR
2. Veissman wall hung boiler and a Weil McCain indirect water heater with 1' and 2' loop system
OR
3. Rinnai E110C Instantaneous boiler with low loss header and DHW, Rinnai air handler
OR
4. Triangle Tube Challenger (combi)
OR
5. Triangle Tube Prestige 110, possibly with Smart tank

(We live in south-eastern Ontario)

Quite confused here and can easily find negative reviews of them, but don't know much about it!!?

Any help, experience or input would be great!

Thanks.