you never know what models and prices you will find available at different retailers these days so stating a specific model at a certain price can be very misleading and\or difficult to acquire.
look for anything that falls within your budget that has:
a large enough screen;
for 16:9, anything above 28".
for ultra-wide(21:9 \ 32:9), anything 34" or above.
a high enough refresh rate;
120Hz or above, higher the better in most situations.
fast response time;
2ms or below, lower the better.
good contrast;
1000:1 or above.
good color\saturation;
16.5 million or above.
good pixel settings;
pitch: 0.23mm or above \ pixels per inch: 110 or higher.
viewing angle;
higher the better
if HDR;
HDR1000, HDR600 at the lowest.
panel type;
whether IPS, VA, TN, etc is mostly up to personal preference. many will swear by each type.
i researched and went to many stores over a couple months just to check out the actual difference and it is highly dependent on the actual model that you are viewing.
my IPS display with a high DCI-PC % looks much better than most of the other types of panels i experienced. but others will still claim otherwise depending on their personal preference or even particular fanboyism.
i would also recommend 1440p at the lowest resolution. a lot of people still try to argue that 1080p is fine, but that's usually because they don't have much experience with higher resolutions or that they just can't afford them and lash out at others because of it.
you should go to a Best Buy or other stores with different varieties of monitors and TVs and see what resolutions and panel types appear the best for you.