I'd say I am advanced hobbyist when it comes to video-editing, but plan on doing more advanced things to the point of an independent pro, how much RAM do you think is good? I want enough RAM so that mac pro won't use virtual RAM. I am thinking with 12GB of RAM, 2GB would be used by OS. That would leave 10GB, so if the video files I am editing are never over 10GB, I am all set with 12GB? How big are the video files the pro's deal with? Is that they correct way to think about this problem? I figure I would have Final Cut Pro open, along with Motion, Safari, and sometimes Soundtrack Pro.