Hi,
I've got a MSI NX8400GS in a diskless MD running 1080p via DVI/HDMI to a Sharp LCD.
Works fine. Haven't ran HD content through yet but I can't see why there would be a problem displaying HD.
However, there are some issues related to playing blu-ray disks. It's nothing related to video cards.
You may want to search posts for further information.
Cheers.