I'm after a 5+kW heatpump (the higher the better but they get expensive) for my dining area which is bitter cold on bitter cold days in the deep south.

Is a Mitsi hypercore the best bet? Daikin? others?

I have a new 6kW Nocria in a previous house - it stops to defrost around 50% of the time (seriously!), a 10 year old daikin (probably 8kW) that only stops around 5% of the time ...

Not counting on any authoritative answers but maybe someone can help ...