AVS Forum Special Member
Join Date: Mar 2003
Location: Lower California
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If the room is dark enough, it should work. Might be a little dim for 3-D.
I've seen an Epson 3020 throwing a pic at least that large on a wall at Frys home theater setup. It wasn't real bright, but I've been in local cinema houses that were dimmer than that. And I think the two PJs are comparable in brightness.
As for mounting height, that's a matter of personal preference. I like the screen not too far off the floor (two feet or so), so I don't have to look up at the image. In your case that would mean some kind of mounting pole for the PJ in addition to any vertical lens shift.
The Optoma HD25-LV might be better as it would give you 50% more brightness. You might have to shrink the screen a bit to accommodate its throw, though.