AVS Forum Special Member
Join Date: Mar 2003
Location: Lower California
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I have a not-too-different basement alcove that I'm dealing with.
IMHO, your main issue isn't going to be finding a projector with the right throw distance. Use coderguy's eliteprojector calculator and you can pin that down well enough from different units -- the two BenQs are probably your best bet (W1070 or W1070ST).
A bigger issue would seem to me to be how boxy your audio is going to be coming out of that space. You can read up on this until you go blind in the HT dedicated thread here. The gist is, you might pursue two basic routes to mitigate this problem:
(1) cover everything in there with absorbing panels, including the ceiling (better yet, remove the sheetrock, stuff the walls and cover them with HVAC duct board and fabric/carpet), and
(2) to maximize your screen size at the wall, drop an AT (acoustically transparent) screen one foot in front of the wall and put your speakers behind it. (This might require using the W1070ST projector).
Better to think about this now than after everything's done.