KTC 27” 180hz QHD Gaming Monitor, 1MS, Fast IPS, HDR 10, FreeSync&G-Sync $259.99 (with $40 coupon) @ Amazon

I recently bought one, never had a HDR monitor before so can’t comment how good it is, but for gaming seems great!

Fixed stand.
Looking online, appears KTC has been for a while and is fairly well regarded in the US.

Marketing text stuff:

180Hz & 1 MS Experience the thrill of gaming like never before with this stunning 27-inch monitor, featuring an astonishing 180Hz refresh rate that brings every frame to life

122% sRGB