Asus recently released:
VG27AQ: 27" 1440p IPS, 1ms, 155hz (or maybe 165hz, conflicting marketing), G-Sync, --> https://www.asus.com/Monitors/TUF-Gaming-VG27AQ/
VG27BQ: 27" 1440p TN, 0.4ms (why not 0.5 beats me), 155hz (or maybe 165hz, conflicting marketing), FreeSync, --> https://www.asus.com/Monitors/TUF-Gaming-VG27BQ/
They are both new and one of the cheapest options out there (especially the IPS version). Linus's recent review on the VG27AQ stated an MSRP of US$400ish. It's a very simple monitor which does its job, no curve, non of that unnecessary RGB, however, because it's so simple it also lacks USB ports and speakers.