I am researching my first proj. purchase, and I need to know if my ceiling height of 6'8" is too low for a ceiling mount? I plan to make my own, if that matters. The room is aprox. 12'X17'. My screen will be 16:9, probably going all the way up to ceiling. If ceiling mount won't work, I'll have to use a stand/table or get a long throw to go on rear wall, such as Hitachi Home-1. Thanks for any advice you can give.