Dale, you must have been reading my mind yesterday - I was grappling with the same decision! I can't tell you which is better - I'm certainly no kind of authority on anything non-technical! I can share with you the mental process I went through.
I'm working on my husband's family right now. After going back to his 3-g grandfather, I started coming down from him, adding all his children first, then systematically going to 1 of them and adding their spouse and children, then going to 1 of them .... down to all dead family members, with names of living ones in their parents' profiles. There was one spouse whose LNAB I couldn't find, although I did have a lot of information about her life. Initially, I had decided to skip adding her because I didn't want to create another Unknown, but after I finished with her children, their spouses, and her grandchildren and their spouses, I changed my mind and added her. I didn't want to leave that big a loose end hanging in the family.
it's Mary A (Unknown) Lynch in case you want to see it.