Heat control is very important. Rad valves or zone valves should be installed, depending on system selected, thermostatically controlled are the best way to achieve this. The heat source also requires tight temperature control for efficiency.
I would also advise on whatever system is chosen that it should be fitted with an UPS, which will maintain the pumps fans etc during power cuts.
We have a coal fired boiler (Demi Docum) located outside, which will burn a mix of logs and coal, not hopper fed, which supplies heat to all of the house. Being outside this keeps dust and smell to a minimum. Requires emptying once a day, feeding three times a day on cold days. Cleaning once a week, about 1/2 hours work.
We have a very warm house every room is set to the desired temperature.