All, I have just bought an external monitor to make a dual screen set up with my imac. So for the first time I am looking at the colour profiles. Would I be right in thinking that if I select profile "sRGB" on the external and "sRGB IEC61966-2.1" on the iMac then when I have the two screens side by side, the colours will match? I have using the Apple 'iMac' profile for two years and anything else just looks strange. What is the 'true' colour or is it just a matter of opinion? Which profile is nearest to real life?