The 4K 144Hz gaming monitor I happily use daily is on sale today for $580

pcgamer.com:

I'm using the Gigabyte M28U as I write this—I'm a big fan of its impressive IPS panel and 4K resolution. I've waxed lyrical on this monitor enough already in my review(opens in new tab), but since it's currently sitting around the cheapest we've ever seen it over at Newegg—as one of its Memorial Day PC gaming deals(opens in new tab)—I thought I'd take a moment to explain why you might want to pick it up for yourself.

Essentially, it's a 28-inch 4K monitor with an excellent IPS panel for $580(opens in new tab). That IPS technology makes sure color reproduction is accurate and there's a real depth and breadth to every frame. While the 4K bit makes for an immensely detailed gaming experience. 

There's also a ton of real estate for windows and applications if you want this monitor for work and play, which is what I use it for. The 28-inch size is a little bit restrictive for 4K compared to some, and you'll probably want some Windows scaling to make text easily readable—in fact you will want some scaling—but the pixel pitch is high as a result of its compact size and that makes for a really crisp overall image.

It's also responsive, with a 1ms GtG speed able to keep up with that 144Hz refresh rate and retain an image which is nice and clear. I recommend that if you do pick this one up, stick to the Smart OD overdrive setting, rather than use the more intense overdrive options. Those can cause a little ghosting. FreeSync Premium Pro support helps keep most issues and tears from appearing on this monitor besides.

Gigabyte M28U | 28-inch | 4K | 144Hz | FreeSync Premium Pro | 1ms response time | $649.99$579.99 at Newegg with coupon code MDSBS24344 (save $70)(opens in new tab)This 4K gaming monitor looks stunning, runs fast, and