For me in Utah I like all three but my first choice is now heated seats as long as you can get them for the driver and the passenger (I think Malibu still only has driver), second choice is heater, third choice is hot water shower. That being said hot water is a must and the most important thing in early spring and late fall. For hot water I now use an electric kettle at the lake where I have power, before I had power I would bring hot water in a cooler from home if the boat did not have a shower.