i have recently bought a mac pro. i had a dell 24" display that is about a year and a half old (a 24"e248wfp). i wanted dual 24" monitors, so i bought a dell 2408wfp. i've tried calibrating both monitors multiple times, but cannot get the colors to match. i'm thinking of just returning the second dell. i have tried, many times, to make the newer monitor my main screen, but even if i switch cables, my dock (primary monitor) automatically defaults to the older monitor. thanks for any help.