Digital BW, The Print

On the subject of white point settings, I use 5000 K for the reason you
mentioned - that it is an industry standard for viewing.  I often have to
make files and prints that match slides, transparencies, or original
artwork, and have a GTI Softview viewer near my computer that allows me to
either use 5000 K reflected light or 5000 K light from behind to see
slides/film.  Many people seem to choose 6500 K because they feel it is
brighter and not that much different, but I find for critical purposes my
setup serves me well.  I'll be curious to see what the reasons are for other
choices!