One note I remember from my research, variable speed systems are tightly coupled to the thermostat so you may not be able to use an easily automated thermostat.

One note I remember from my research, variable speed systems are tightly coupled to the thermostat so you may not be able to use an easily automated thermostat. My thermostat shows humidity (Mitsubishi MHK2), but as far as I can tell that doesn't factor into when/how hard the AC runs.