I'd go with the satin.
Are you planning this as a DIY project?
If so, then you are on the right track with resale value and other's opinions.
Black shows everything, especially shiny black.
Longevity.... depends on what's there already, what you do for prep and what your material is.
My guess is that this is a job you can revisit every couple years, so longevity shouldn't really be an issue.
Oh, yeah, a short nap roller is probably better than long...
