This 5K monitor competes with my Apple Studio Display (and it's much cheaper)
The Asus ProArt PA27 has an impressive picture with 5K resolution and a vibrant color palette, making it one of the better choices at this level for Windows users.
Dell’s 27-inch 1440p IPS monitor is terrific, especially for $160
This mid-sized monitor is a great addition to any multi-screen setup, and right now it's $60 off at Office Depot.