I currently use a Mac Mini as a media center with a Panasonic projector. Its a little slow playing HD movies, so I am looking forward to better graphics support

I currently use a Mac Mini as a media center with a Panasonic projector. Its a little slow playing HD movies, so I am looking forward to better graphics support. I am concerned though that I might not be able to play iTunes movies via it if they have DRM crippled the display port.