Projection system help

I am setting up a home projection system in a room with the following dimensions:
16'4"X21' with 9' ceilings. I am using a Chief Sl-150 projector lift. My first choice for a projector is the Optoma HD 8600. The screen will be placed on the shorter wall, recessed into the ceiling. Firstly, Chief does not make a plate for the 8600, so it will have to be laid inverted in the tray, which lowers about 8". I am flexible with throw distance, but will the projector be able to work when it will only be suspended about 8" from a 9' ceiling? I REALLY want a quality DLP projector, and this one seems to match my needs and budget (~$3000-$5000). The projector is not very forgiving horizontally (+/- 5%), so placement will be tricky. Any suggestions on choices and optimal placement method would be GREATLY appreciated. I need to make a decision soon.
Lastly, the walls are beige and the ceiling is white. I want a screen which will work with the current color setup, but would also greatly benefit from a likely color change in the near future.

Thanks

Read more: Projection system setup - Home Theater Forum - Home Theater Systems - HomeTheaterShack http://www.hometheatershack.com/forums/general-discussion/25578-projection-system-setup.html#ixzz0eu7eApLL