Finalizing projector choice and screen size
I recently finished construction on my basement home theatre and am at the point now where I need to pick a PJ and settle on a screen size, and curious for some opinions on this.
The room is 14'6" x 23'7" with 9' ceiling trayed down to 8' at the perimeter. I will be using either a 2.35:1 or 2.4:1 CIH setup. Seating isn't in place of course but the plan is for the first row to be about 12-13' from the screen. Room can be totally blacked out.
This means I have the ceiling height and room width to go up to around 165" diagonal with floorstanding speakers, or as large as 185" with in-walls and a AT screen. I won't be using an anamorphic lens at the moment.
Will any of the sub-$4000 4k projectors be bright enough for even the 165" screen setup? Should I be looking at brighter 1080p projectors until 4k stuff becomes affordable? Or should I be compromising dramatically on screen size, and if so what is the largest screen I can get away with here at adequate brightness?
I'm familiar with the formulas for calculating necessary lumens at various screen sizes and gains, but do have one question on that - is the brightness needed assuming a 16:9 image or should I be adding 25% to the total lumens to account for zooming to 2:35? If my math is right I would need 1,637 lumens on a screen with a 1.2 gain, or do I need to add 25% to that to account for brightness lost zooming?
Open to any and all solutions to this puzzle!