Mainly down to a few brands , LG, asus . Gsync , freesync. 1440 , with display port and hdmi . And cost .
At least with currys and distant selling regs it can be returned if undesired . Wasnt actually fixed on the 165hz, just from a few that caught my eye that had it. But only 2 that were sub £300 after thinking more . Had a brain fart over past few days thinking I was prepared to spend more, like double 🤫.... balls to that ! Was this LG above or asus below :
https://www.currys.co.uk/gbuk/gaming/pc-gaming/gaming-monitors/asus-tuf-vg27aq1a-quad-hd-27-ips-lcd-gaming-monitor-black-10220251-pdt.html