Originally posted by Digitalis With appropriate calibration hardware, along with diligent use of said hardware, should make just about any IPS based display perfectly fine for photographic purposes.
So the higher-priced monitors are just a complete rip-off?
I don't think so.
A bad monitor can have banding issues after calibration; even if it uses a decent panel the firmware may dish up a weird gamma behaviour.
There can be differences in the bit-depth supported and in the coverage of standard colour gammuts.
Cheaper displays will also suffer from homogeneity issues (regarding brightness and in particular regarding colour).
Of course, achievable black levels differ and light leaks or clouding, etc are also more common on cheaper panels.
The list could be continued, but I guess it has become already clear that a calibrator cannot turn a crappy monitor into a good one.
Price differences between calibrators can also be justified as there are different inter-instrument variations and different capabilities to deal with various types of panel types. Measuring speed and accuracy with respect to dark tones also vary.
I'm not saying it is not possible to get an OK looking image with budget equipment, but the idea that all devices do basically the same job has no merit at all.