
Valerion
VisionMaster Pro 2
Great picture/gaming, but RBE and no lens shift are dealbreakers.

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Not 4k120, but I play Rocket League on my BenQ TK700STi in 1080p240 and it’s lovely. So good in fact that I permanently moved my gaming PC to the theater after trying it out. Personally I’d be more concerned with the response time than framerate or resolution. Anything more than 10ms will be annoying for most competitive play.
RBE hater here represented - I actually tried out a TK700Sti after reading all the good stuff about it. Turns out, I see RBE literally almost every second, and hated it. Returned it, and now have an Epson TW7100 (or 3800 for US) and love it. Tiny bit softer picture, but other than that it's perfect for my needs.
You don't really get 'better' projectors for less money, but you get better for the same amount of money. Based on your room size and request for as large of a screen as possible, I would look at the BenQ TK700STi. It would need to be a refurb, and still may not be within budget. It can fill the wall you have edge to edge without problem from 8.5' or so lens to screen (throw distance). Learn how to use this tool and what all the terms mean... [https://www.projectorcentral.com/BenQ-TK700STi-projection-calculator-pro.htm#calc](https://www.projectorcentral.com/BenQ-TK700STi-projection-calculator-pro.htm#calc) There aren't a ton of 'short throw' projectors on the market, but they do have their uses.
from those the x500i, if you absolutely need the extra brightness then the tk700sti but even better is the updated tk710sti so i'd personally go for that (ebay refurbished that ones is $1563)
Look into BenQ TKI700STI, it's 4k with good brightness and shorter throw distance than regular projector. I got one and I have been very happy with it, ofc image is not as good as TV, but I appreciate the size over TV like quality. But the image quality is still pretty good! I find it usable for not so intense watching on daylight even during summer, but if I want to have a gaming session or watch movie on it then I prefer to completely blackout the whole room. I got 120" picture from around 3m throw distance.
I have the Benq 700 STI, 4K, 3200 lumen, practically no latency (if you want to play games), you can easily find it around 1000€ 😉

Valerion
VisionMaster Pro 2
Great picture/gaming, but RBE and no lens shift are dealbreakers.

Epson
Home Cinema 5050UB (V11H930020)
Great value with huge lens shift, but outdated lamp tech and poor HDR.
Epson
Pro Cinema LS12000 4K PRO-UHD Laser Projector
Superb 4K/120Hz gaming and no RBE, but requires calibration.

BenQ
W1070
Budget king, durable with good image, but RBE can be distracting.

BenQ
HT2060
Excellent 1080p contrast and quiet gaming, but low brightness for big screens.

Ranked #1
Valerion - VisionMaster Pro 2

Ranked #1
Epson - Home Cinema 5050UB (V11H930020)

Ranked #1
Hisense - Laser TV PX3-PRO

Ranked #1
Anker - NEBULA X1 4K Triple Laser Projector (D2351)

Ranked #1
BenQ - GV50 Portable Projector

Ranked #1
Anker - Mars 3 Air