Yeah, you need to at least indicate your preferred price range, size of screen and resolution.
1080P displays around 21-24" are very cheap today and it's hard to find a totally crap unit. Personally I wouldn't go smaller than 24, but that's just me. It just feels more comfortable reading on a 24" display I think, although people with younger eyes may disagree... A smaller screen also takes up less deskspace, if that's a concern, although the difference is relatively minimal.
Panel quality is more complicated; most displays (by far!) still use TN LCD panels. These have very bad color reproduction, even worse viewing angles and quite disturbing color and contrast shifts if you move your vision off a straight-on-center angle. They are the cheapest alternative though, and switch fast, and can be quite bright.
Next step up are various VA panel types, these have better angles (but still not great), better color accuracy (and again not great), much better contrast, and slower pixel response time, although modern LCD controllers have ways around that by using overdrive, which can be quite effective at hiding the lag so it's usually not a (big) problem. Overdrive can introduce its own types of visual artefacts but only a nitpicker ought to be annoyed by this in a good, modern VA display. BenQ produces a number of cheap, high-quality VA displays. You can find reviews at places like Anandtech for example.
IPS panels give the best overall image quality; the best colors and viewing angles, which is why they're used in high-end professional monitors from makers like NEC and Eizo, as well as high-end smartphones and tablet computers. The major point here is that even though IPS doesn't have the best contrast (still good though, 800-1000:1 are common figures), you don't get huge shifts in the image just by leaning from one side to the other in your computer chair, something which happens with cheaper panel types. There are now quite affordable IPS displays using 6-bit-per-pixel panels; these don't have quite the same color accuracy as a full 8-bit panel, but the lower price makes up for it.
PLS displays are only made by Samsung (it's their proprietary tech) and is a variation of IPS; said to be cheaper and sometimes better. It's not really better actually, but still really good, especially compared to VA and TN displays. PLS displays typically aren't available in the budget bracket though, and for computers, not really found in smaller, lower-rez sizes either. I own and use the Samsung SA850 display which is a 27" 2560*1440 pixel monster that costs US$850 at Newegg. It's a really nice monitor and fairly cheap for its size and performance, but not really what you call cheap in absolute terms.
