I have to decide whether to order my 300C with or without a sunroof. Living in Canada means snow and cold weather for at least 6 months a year. I wonder how much use I would get out of it. Also concerned about security---can a bad guy just break the glass and enter? Some people on the chatline say they are rattle prone and leak. Is it so? Does it reduce headroom? Does it increase resale value or hurt it? In hot weather is it just easier and cooler to keep it closed and run the A/C? If you have one would you buy it next time?