An even faster reply....
I have my eye on you!
Very few presentation PJs are suitable to use in a dedicated Theater....most being 4:3 format with a few newer ones being 1280 x 800.
Contrast is King...and once again, the brightness and lack of appreciable contrast in such Presentation PJs works against the quality of a true Movie image.
However, the use of a darker Gray screen can help mitigate both issues, by attenuating brightness and increasing Black levels.
But....the real object is to ideally balance the performance of the Pj to a screen. That would also mean trying to get a 1080p Pj with appreciable Contrast Specs and a Lumen output of at least 2000
Doing so, and by getting the room into a color scheme that also benefits your viewing, by purchasing a Refurbed PJ and painting an ideally suited screen, you can achieve tremendous performance on a extremely low budget.
Not "Free" mind you...but you can walk into a 120" diagonal image w/1080p quality for well under $1500.00
A Epson 8350 has a extremely long Focal range, 2000 lumen output, 50K:1 Contrast, and Lens Shift. Hard not to find love in a Pj you can get all that with only a $899 outlay (New) and a additional $125.00 worth of materials for a excellent DIY Drywall Screen
Bump up to a Epson 8700 Refurb for 200,000:1 Contrast for about $500.00 more.