I am currently buildy my home Thetre and I am inexperienced on front projectors ! I am leaning towards the panasonic PT-L300U with a ceiling mount. My question is that i have a very low ceiling in my basement (83"). I know i have enough head clearance but do i have enough of an angle for proper wall projection ? If so how big of a screen can i go without problems as the screen will obviously keep getting lower to the floor as the size increases. I do have unlimited width so that is not a problem ! Thanks for any advise on the situation and for comments on the projector choice or a screen recommendation !