[Avidxpressprouser]

I would recommend Avid Studio Pro

-Integrated with Boris FX, Pro Tools, Avid 3D, etc.
(Can pull an avid xpress pro timline right into one of the programs, make changes and its automatically added right in to the xpress pro timeline. no importing, exporting, importing again, Big time saver.)

-For the 50 inch plasma, just use it for, as you said, a full screen display

-I would recommend backing your fine cuts onto tape. I like a physical copy of the final product to keep for archiving. No risk of deletion. Nor wasted disc space.

Hope these suggestions were helpful.

-Josh Lynch