Happy Day! I installed the card, and like many had said, I was able to adjust the overscan pretty much prefectly. Looks like this will work out (of course, it's only been an hour!).
Interestingly, I have a BR mkv (about 12,000kbps I think) version of the movie "The Music Man" on my server, that previously would not play correctly (extensive studdering) using MB Classic on her pc. Now it plays fine.
However, I added an mp4 movie yesterday (Pirates of Penzance) that is only about 3000kbps, and it will not play using MB Classic, but it does play using Plex.
Also, none of the QT based movie trailers play either. I'll have to head over to the MB forums for that.
Much thanks to everyone for your input and suggestions!!!