OP said amazing contrast so doesn't that rule out IPS monitors?
Not really. The purpose of most monitor for digital artistry work is to match the industry standards. The standards are there for a reason, as they are what are used to have multiple people be able to work on a project together when using different equipment. This lets everything stay consistent and allows to conversion to different media, such as print (think movie posters, billboards, display pieces, advertisement kiosks, pamphlets, magazines, newspapers, etc), or use in digital projects (think online ads, video game assets, digital movie assets, digital videos/movies, DVD/Blu-ray/UHD/cinema master drives, etc).
If the purpose is to use the monitor for artistry work, matching the standards in use by the entire production chain is the utmost important thing. The last thing you want is for a monitor to run your image through an "enhancement algorithm" to which makes it look more "vivid", or "lifelike", etc. (basically just about everything that TV and computer monitor manufacturers typically do to separate their product from their competitor's so that it "looks better" on the demo loop that is running at the retail store). That is the last thing you want on a monitor for a digital artist as you are then tweaking and creating an image to look good on your specific model of your specific brand display, not realizing that your display is "correcting" things behind the scene on you, such that the moment that you take it to be viewed on another monitor, it looks completely different than what you had intended, with colors, hues, lumens all off from what you really wanted and as such might not match correctly with other works that you are/were using as reference materials.