Depending on the layout of your home another option for the AC would be a ductless AC or a mini split. I first encountered these mini split systems while traveling in Mexico. They are whisper quiet and supposedly very efficient. The ones I have seen are so quiet that the first time I used one I spent 5 minutes trying to figure why it would not turn on [[It was on)

http://www.homedepot.com/b/Heating-V...s/N-5yc1vZc4m1