I recently purchased a remodeled home that has new central heat and air installed. I need a new thermostat for various reasons. I'm out of town usually weekdays but my schedule can vary at times so I definitely need a programmable thermostat and one with wifi support preferably so if i am gone for an extended stay that is unplanned I can change my thermostat from my phone or computer. Now my dilemma is like many home owners in that my home has an upstairs that is generally warmer than the downstairs. The home is well insulated with r19 in the walls (they are an oddball wall at around 2x7). Overhead is blown in and windows are all new. I would like a thermostat that will support a wireless thermostat I can put upstairs and will either average out the temperatures or will let one over ride the other when the upstairs is above a set temperature. Also I'm looking into retrofit zone systems so I'd like a thermostat that can support that. Any help choosing a thermostat would be appreciated and also some info on these retrofit zone systems in case the remote sensor doesn't help the problem enough. Thanks.