Take a look at the Matrox MXO2 Mini. It is an In and Out solution but it has dual simultaneous monitoring, (component, Y/C, composite, and HDMI), and the calibration tool widens the range of monitors you can use for colour correction. And the price is right.
Terry
moving parts are so last year
MAC Pro quad 2.66, 8GB, X1900XT, 23″ ACD, 10.5.8, Studio3, MXO2 Mini, etc.