The throw distance isn't set in stone. Many will tell you that you
should/must put the projector as close to the screen as you can for the
increased brightness. However, with the brightness of today's projectors
that's no longer as big an issue. I have my projector 19 feet back from a
16x9 134" 1.4 gain screen. Not only does this give me better contrast it
minimizes any chance of hearing projector noise since my seating is only
about 15 feet back. One thing you don't want to do is put the projector at
either extreme of the zoom distances as it limits your ability to size it
properly to your screen.
Based on everything you've said up to now I would steer you toward the 8500
despite being a happy 4000 owner unless you already know that you prefer
better shadow detail to black levels. I've been comparing my new Samsung
LED HDTV to my AE4000. When I first turned it on the brightness and black
levels of the LED blew me away compared to the 4000. As I compared both
images I realized I actually preferred the better shadow detail of the 4000
over the LED, however if I wasn't comparing the screens I wouldn't have know
I was missing anything in the HDTV image.
While I think either of these projectors would serve you well I think the
8500's strengths play better toward your intended use than those of the
4000.
It wouldn't hurt to call "ProjectorPeople.com" and talk to one of their
reps. They usually get to see demos of the projectors and if you can talk
to a rep who's seen both they can give you a better opinion of which to get.
Cheers,
Dean
