Dell 27" 1440p WQHD 165Hz 1ms GTG IPS LED FreeSync Gaming Monitor (S2721DGF) - Grey is on sale at Best Buy Canada and Dell.ca for $399.99. It's unclear to me what the original price is since Dell and Best Buy Canada state different original prices.
Regardless, this is a fabulous high quality monitor that is well worth every penny. Doesn't have speakers but who uses monitor speakers to begin with?