the dell one is a little light on the details.
obviously, the resolution is important. but a preference thing.
the most important monitor specs are response time (2ms ideally, but no more than 5, and it needs to be measured white to white, not grey to grey) refresh rate (60 is normal, but 120 would be great) and contrast ratio (the higher the better, but if its dynamic, you can pretty much ignore the number they give you.
basically, just look at some monitors in your price range at the desired resolution, and compare the w2w/b2b response time, contrast ratio, and refresh rate.