Well if you have a G4 to match it with I would go with it for appearance sake. However it uses an ADC connector so you would need a DVI to ADC adapter that will supply power for the Cinema display. Since those old displays get power and video through the one cable.
For anything other than a Powermac G4 I would just buy a new display. Low end ones are really cheap off of newegg. They will have much better response times and I would imagine color quality would be better just because of how much newer the panels are. Though I can not personally attest to this second supposition.