Need Help! Equipment for "semi" dedicated HT room
It's been a LONG time since I've posted on here and even longer since I've had to ask for help getting a projector (put it this way, my current projector is the 720p Panasonic AE900u, which I still love).
So the time has come to change my basement romper room into semi dedicated HT. I say semi because it will still be used for the kids to hang out a little etc BUT I will be using it primarily to watch movies/shows on the new projection system.
So first thing's first... ...my assumption is that a new projector will be leaps and bounds better than my current Panny. This thing is 15 years old, its 720 and I'm sure projector tech has come a long way.
That being said, I'm a little confused by HDR vs 4K, etc. Is HDR and 4K the same thing? Will I see a huge improvement from just regular 1080p to 4K/HDR? I know I need the prerequisite items to feed the projector 4K, but just wondering if it would be leaps and bounds better, or just marginally better. Wondering if I should consider any 1080p only projectors?
My room is 25 x 12 and I'll be watching from about 23 feet away projected onto a painted screen on the wall.
Here's what i'm thinking for equipment:
Projector: Optoma UHD50 (or 51 if there is a imagine quality reason why) or BenQ HT2550, or any other similarly priced projector that you guys would suggest be better.
Screen: Painted screen on the wall, approx. 130 inches diagonally. Don't know if I should go gray, silver or white. Depends on which projector, correct?
Receiver: Thinking of the Denon AVR-X2500H (4K Ultra HD 60hz supports HDCP 2.2 on all HDMI ports)
Source 1: Amazon Fire Stick 4k
Source 2: Sony UBP-X700 4k Blu Ray Player
Cables: I'm a little confused here as well. I buy my cables from Monoprice and looked up 4K HDMI cables and see all different ones, some 4K at 24hz, some 4K @60hz. No idea what I should be getting here...
Is the items above all I need to get true 4K and the best out of these projectors? Or am I missing something?
Another question, is Rainbow effect still a thing with the new tech out there? I tried an Infocus projector about 15 years ago and it had bad rainbow effect for me. Just wondering if that's still a consideration in DLP vs LCD these days?
I know this is a lot so thanks for anyone that can help out!