I think their "class B" makes the most sense: allow www, but redirect it to the same URL without www. I do that on my own sites, and no-www.org does the same. They explicitly say that making www not resolve at all "is not recommended for sites that serve the general public."

That said:

> I could use https:// instead but I like www more.

If your site uses https, communicate it with the https, because otherwise browsers will default to http. (That and get it on the hsts preload list so that some of them won't.)