We have upgraded our collection of random rusting radiators and fitted Jaga radiators.  Because these have their own thermostats on them, they give us more control over room temperatures.  We have also fitted zone valves to each floor so that we can heat different areas at different times (particularly because we mostly work from home).  The radiators incorporate fans which pull the heat from the water, so we can run the heating at lower flow temperatures.  They also have a boost setting, so if the room is particularly cold you can speed up the fan and also the heating process.   The noise is similar to a computer cooling fan and we quickly stopped noticing it most of the time, although for light sleepers a radiator with no fan in the bedroom would have been better.