I live in Kentucky and our winters are not too bad but we usually get 1 or 2 weeks of weather in the single digits or below. Anyway, I have the GI soft-top and the artic gas heater. This is a good combination for me. It keeps the cab cool to warm in single digit weateher and defrosting the windows has never been a problem. When the temp gets to around 40, the artic heater will make you sweat in short order. Cold Weather + Drafty top + artic heater = hot feet and cold ears. Let us know what you decide.