We are currently using an Apple 23" LCD display on our Media 100HD system, but we are connecting it via an AJA HD SDI to DVI-D converter.
We only use this as a client viewing monitor but the images look great. We use our Sony PVM for any critical viewing! The only issue we have with the apple LCD is when the system is in digitize mode, the vision is not very clean and often breaks up. However, if you play that same media back after capture it looks fine.
It would be great to know if anyone out there is using the HD VGA output directly from the Media 100HD card to an apple display, and what sort of picture quality they are getting. It would also be interesting to see if there were any differences in quality between the HD VGA output and converting from HD SDI - DVI-D via the AJA adapter.