difference between 2405 and 2407?

[jerb]

these both seem to be dell panels, I'm guessing that 2405 is the older of the two (perhaps being manufactured in 2005?)

Please let me know. (also; are there any problems associated with the 2405? If I get a bad monitor from a used deal can I send it back to dell should it break?[ie is the warranty transferable?])

thanks again guys!