I think they are all pretty much the same functionally. That being said, I like Honeywells products the best. After all, they make and sell lots of thermostats so maybe their units are slightly better?
My guess is that any of those would serve your purposes. I am pretty much a data junkie myself; so, in addition to the cheapest one from Radio Shack I have a SensorProbe 2 from AKCP that has a pair of temperature/humidity probes. See akcpinc.com" onclick="window.open(this.href);return false; The SensorProbe is neat because it (1) has a web interface that I can view from any computer and (2) it e-mails me if there are any changes in temperature or humidity.
AJG, do you have a suggestion on where to get a SensorProbe2 and the accompanying sensors? My wine fridge is in the same mechanical room as my water heater and a few other things. I’m guessing I can use a water leak sensor with the SP2 as well.
I had the predecessor to the first one in the list. Finally went out after 4 years of use. Time to get another cheapie to replace it. Buy the cheap one.