Digital Foundry makes a few recommendations starting at the best overall gaming 1080p monitor that has a great low price to some superb 4K displays. One thing I've noticed is that if you want to get a very high refresh rate at 140hz - 240hz it's easier to find 1080p displays. You can find a great refresh rate with higher resolution but your options begin to be more limited. That said, keeping the price of a great PC in mind and pushing as many frames as possible 1080p isn't a bad choice for an incredible display.
Let me know what kind of display you are using in the comments and any tech specs you can spare such as size, resolution and refresh rate/hz.