I actually enjoy blowing snow, but I don't enjoy being cold and miserable. So I've always had a cab and heat on any tractor I've had. Unfortunately, the cabs that came from the manufacturer left me cold. They were nicely built, but they were heavy, clumsy and EXPENSIVE. My neighbor has a cab on an x595 that he swears will never come off, even in the summer since it's so heavy.
For my past three tractors, a Bolens, g345 and a Kubota G1800, I've built my own cabs from common building materials and can honestly say they've been just as good, if not better than the factory jobs for a fraction of the cost. I'm about to build my next cab for an X728 and will document the build with pics and text for anyone interested. It won't be a step-by-step instructional manual, but it'll give you an idea what's involved and you can decide for yourself if you're interested in doing it for yourself. Even though I'm building it on a 728, the same basic principles should be applicable for most any series.
Stay tuned, I'll be getting into it tomorrow.