I have a Rovers North rad muff for my SIII w/2.5 diesel & electric fan (with on/off switch installed). True winter is easy--just button it up. The lead-ins to winter and spring is a bit trickier--You've got to account for the outside temperature and the type of driving you'll do (city or highway) and open the muff accordingly.
Back on topic, if you want to use a series rover as a daily driver, go for it, but remember--more so than other vehicles, you'll not just be getting an old rover daily driver, you'll also be getting a whole land rover lifestlyle, which can cover all the extremes of emotion, sometimes in the same day!