Over the past 10 years the members of this forum have been my best source of information on several projects. I am now planning on installing a projector and screen in my family room and I would love any advice I can get. 1. My projector will need to be about 4 feet above the top border of the screen and about 18 to 20 feet away. Is this too high for an adequate picture and is there a particular projector that can handle this better than others? 2. I will need to use a retractable acoustically transparent screen because my center channel speaker will sit behind it. Is the black masking above the screen acoustically transparent as well? 3. Will a ceiling fan blowing on the screen affect the image quality? 4. Does an HDMI signal degrade over a distance of 30 feet? 5. When 3D becomes more common will FPTV's be able to utilize the technology? Will this require buying a new projector in the future? I realize these are a lot of questions but I trust the members of this forum more than any salesman or home theater installer. Thanks for any advice anyone out there can give me.