In reply to:

The best option would probably be buy a larger, nicer 32-36in tube for tv and a projector solely for movies at night.


Yeah, do that! That is exactly what I did, too -- I placed a pulldown screen right in front of the built-in TV shelf, so that we can use both as needed. Incidentally, the image on typical RPTVs are also fairly dim. You will need a decent ambient light control for daytime RPTV viewing anyway.