Rather than suggesting a specific model, here are some more general comments...
A quality photo editing monitor isn't cheap! But the good news is that prices have come down a lot in recent years. For example, both Benq and Eizo are high end brands that have offered some more affordable models recently.
I'd recommend a minimum of 24" monitor... and personally haven't looked at anything larger than 32" due to the prices on anything larger than that. Figure spending a minimum of $500 to $800 for a good quality, reasonably priced image editing monitor in those sizes that meets most of the recommendations below. If you want larger and even higher performance, you can easily spend a lot more!
Monitor size is also effected by aspect ratio... The 24" I use now is 16:10 ratio. This works pretty well allowing the image to be fully displayed in a reasonably large size while working with software that has panels on the sides (Lightroom, Photoshop) for various tools and/or "film" strips of images across the bottom of the screen (Lightroom). If the aspect ratio is a more common one such as "wide screen" 16:9 or greater, a larger overall size would be needed or work space will be cramped and image size will be reduced. For 16:9 I'd step up to 27" minimum.
Also look for key features such as the color range covered.... The best image editing monitors have access to 1 billion + colors. Contrast range should be 1000:1 minimum, but higher would be better, if possible. Most are "IPS" or "in plane switching" back lit LCD screens.
I don't think it matters much if a monitor is 4K or "just" HD resolution... But with 4K monitors it's necessary to be able to increase font size of labels in various software. Otherwise tool labels and such can be too small to read comfortably.
For image editing I also look for features like a non-reflective surface and the availability of accessories such as a monitor hood. The latter is nice, if available, but not a deal breaker because I pretty easily made one for my current monitor with matte black foam core board attached to the monitor with Velcro. It works well.
Some monitors also can be rotated to vertical orientation, which may be handy for someone who shoots a lot of portrait orientation images.
Personally I have no need or use for a Touch Screen monitor. That would severely limit selection, very likely increase price and require much frequent cleanings (in large part due to my Cheetos addiction
)
The mouse works fine for me, but there are also Wacom pads and similar that some folks like to use. (I tried one some years ago and didn't like it. May try a newer version sometime.)
I agree with other posts that hand-in-hand with a graphics quality monitor, a calibration device is essential to do image editing well. Look into the availability and compatibility of those for any monitors you consider. I've seen bundled deals and even occasionally a monitor that comes with a calibration device. Datacolor/Spyder and X-Rite are the two best known brands of calibration devices. Prices for those start around $150, but if you do any printing the device will essentially pay for itself in savings of wasted ink and paper, or the cost and delay of reprinting if you outsource.
Be sure your computer is up to the task. It may need a graphics card added to support a properly calibrated, high resolution monitor.