I'm thinking about getting a Guru this year and am trying to decide between the DigiQ and Pitminder. I'm not really that interested in the extra control features (i.e. ramp mode, open lid, etc.) of the DigiQ but did notice that it uses thermocouples instead of thermistors like the Pitminder. Is there a significant advantage to thermocouples that, putting all other features aside, makes the DigiQ a better choice over the Pitminder?