AI summary
If you're building a gaming PC and want one monitor to do everything well, the LG 27GP850-B is the obvious pick. 27 inches, 1440p, 180 Hz on a Nano IPS panel — none of those numbers are the absolute best on the market, but together they hit the spot where competitive games feel sharp and immersive at the same time.
The 1 ms response time is genuinely fast for IPS; you won't see smearing in fast-paced shooters. Color is good out of the box for an IPS — saturated without being cartoonish. DisplayHDR 400 is a label, not an HDR experience; treat the panel as SDR with a wide gamut and you won't be disappointed.
The port layout is plain (1× DisplayPort, 2× HDMI, 2× USB) — no hub, no USB-C. That's fine for a dedicated gaming setup.