Hey Mike. We were just talking about this in another thread here in this room.
I Use a combination of Helix DBS1000s and Herpstats thermostats.
Although, I will say with a nice dimmer switch set-up and a good thermometer (non-contact type maybe) this way would be very affective too.
I think here, its what ever works best for your set up and maintains your level of heating quality.