Recently got a 5050 and 120" screen set up in my dedicated room. Still a work in progress, but I've got some thoughts at the end of my long-winded ramblings below...
Using 30' Monoprice premium certified HDMI without issue from receiver to projector, and 20' & 25' cables from Xbox One X and Sony x700 4k bluray to receiver, and 15' Monoprice premium certified between AppleTV4k to receiver. So in summary, up to 30', the premium certified Monoprice cables work fine. Got all the checkboxes on this and that, no issues.
My room is a very good chunk of one half the basement, 12' wide, 28' long, and 7' ceiling; not great, but manageable. What is not manageable is very light carpet and white walls/ceiling. Since it's a dedicated room, I decided to start project blackout. 30 yards of triple black velvet, and a couple cheap black rugs from Lowes made a world of difference. It's all still a very early work in progress, but I thought it would be nice to share some pics of what you give up when you've got close (white) side walls, and very close (white) ceiling, and light carpet close to the screen, vs what you get when you start blacking things out... I'm going to order up the roughly 60 more yards I need to finish, and be able to wrap speakers, and whatnot with the excess.
Due to a "wonderful" gas fireplace, I can't do a painted wall, so I did the next best thing, I hung a 120" 16x9 screen in front of the bump-in for the fireplace. Now, that leaves me precious little room between the ceiling and screen, and screen to floor. Gotta love houses built in the 1950's... But, all that space behind the screen works great for the gear and front pair of subs and amps. I was able to wrap the velvet in such a way that I can still get behind the screen, there's ample space for air circulation and whatnot. I got a cheap Elite Sable 120" screen, and I'm giving SERIOUS consideration to building a false wall and going DIY spandex scope screen from wall to wall, but for now, the Elite 120" is working pretty well.
Hopefully the pics go up in the right order, but the first pic is a grab from Rogue One, with just the screen hung and projector mounted on the ceiling. I have 13' from screen to my seating, and the projector lens is just about 17.5' from the screen. Light spill is atrocious from everywhere. Ignore the old tv stand and whatnot, that's not the point of concern.
The 2nd-7th pics are just some pics showing the 30 yards of black hole on a roll, to velvet on walls progress. Staple gun. It ain't pretty with lights on when you get up close and personal, but you see pretty much nothing beyond 2' from the walls with all lights on, and you see nothing at all with lights out.
Pic 8 is after 88" or so of velvet on walls and ceiling; it's pretty close to the first pic for comparison.
Pic 9 is after getting the velvet below the screen and black rugs down; it's not the exact same shot as before, but still shows the black level improvement. Also have velvet drape over the entry door.
Now, yes, I'm going to get black paint for the HVAC duct, I'm also going to cut out covers for the can lights (don't usually use them anyway) for the front 2. Yes, I know the pics show it as a mess, but those were all work-in-progress pics to show improvements.
No, the projector isn't calibrated (not enough hours on it yet). Yes, this is my first FP system. The jump from 70" to 120" is pretty significant. I still need to figure out what I need to look at for HDR; seems I have to set the slider down quite a bit to get what looks good to me; usually between 3 & 5 depending on movie/show. High power, filter engaged for HDR with no iris, eco and about -6 iris for SDR. Threw in Alaric's settings as a start as I'm breaking-in the lamp. I'm planning to get it calibrated once I get about 200hrs on it, which at this rate, is going to be a few months. Still fighting with my harmony and powering down the projector; it works from blu-ray activity, but not any of the activities I programmed for HBO/Prime video/iTunes movies/Netflix activities I set up for my AppleTV. Pretty sure I just have to change it to not require the double press to get it working 100%.
So, in summary, I can say that in a room with serious room compromises going in, black velvet is the cure for black level blues. The OOB picture is pretty darn good! It is a light cannon. Mine is quiet enough even on high and being only 3' over my head and about 4' behind me. It's near silent on medium and eco relative to the ambient noise floor in the room.
I replaced a 2016 vintage Vizio D series 4k 70" with the Epson 5050UB and Elite 120" setup, so I'm completely new to HDR and how it should look. I will say that the size jump from 70 to 120 inches is, frankly, incredible. Gaming is pretty wild on the projection setup as well, and I think the projector has lower input lag than my TV did! I'm also QUITE surprised the cheapish epson universal mount I got for the projector doesn't complain when my 4 subs start doing their thing. I expected "fuzzy" when bass goes crazy, since I'm 120dB capable at 14Hz and the back wall is flexing and the HT marketplace seats are giving me a back massage, but the screen and projector aren't showing any distress or movement.
I've read the entire thread, and it's a doozy, so wanted to thank everyone for letting a fool like me learn from your hard knocks, so I don't have to repeat the mistakes. At some point I may decide to put all my gear in the back utility room behind the dedicated room, but for now, receiver, Appletv4k, and amps behind screen, bluray and xbox on shelf unit directly right of right-most seat works well. I guess the ideal thing would be projector in utility room as well, but I'm concerned that with a 25' throw, I'd lose too much light; the 14.5' throw I'm running now seems to have me quite bright enough (aka, start to squint on some very bright stuff). I'm sure some hours on the lamp and a proper calibration will fix it right up though.
MiniDSP 2x4HD, UMIK-1, REW... The holy trinity for running multiple subs.
Espon 5050UB, 120" screen, AppleTV4k, Harmony Elite, Sony UBP-X700, Pioneer Elite VSX-LX504, Outlaw 7000x, MiniDSP 2x4HD, 2x HSU TN1220HO subs, 2x HSU VTF-15H Mk2 subs, Defintive Technology speakers: CLR2002 x3 for FR, C, FL; BP2x SR & SL; BP1.2x SBL & SBR; ProMonitor 800 x4 height speakers.