I can't help much on the screen side, as I have a pretty cheap 100" Elite 1.1 or 1.2 gain motorized screen that I am happy with. I personally wouldn't want much more gain because I think I can almost see sparkles when I really crank the brightness on the Epson as it is. At least it seems like it to my untrained eyes. A 5040/5050 is kind of my line, where if I were buying a more expensive projector than those- THEN I may consider throwing a grand at a screen. I just don't feel the benefit would outweigh an extra grand towards a better pj. That's just my opinion though.
I will say that treating the room with darker, light absorbing paint or materials will help increase the perceived brightness and contrast of the projected image. I think it could improve the picture more than a better screen, and at less cost.
Also if you are looking for more brightness, make sure your projector is as close to the screen as you can comfortably get it (considering noise, view, obstructions etc.) while still being in the right throw range. Projectors lose brightness at further distances while remaining the same size, and it's a decent amount from closest to furthest for these Epsons.
If you need any settings advice I think the 5040/5050 are close enough that i could help out there (not fine tuned colors etc, but certain 3d settings that can make a big difference). Just let me know or search my previous posts.
Last edited by ryudoadema; 06-04-2020 at 05:43 AM.