I’ve seen a lot of good things about Schweitzer and the Sandpoint area. It looks absolutely beautiful up there. Plenty of chatter that this is the “next big ski town”. Additionally, having quick access to the BC resorts on the Powder Highway is pretty ideal.
Not sure about a few of their choices (A-Basin, Pow Mow?). I’d say Grand Targhee is pretty well known, but not for the good reasons (mainly the zombie subdivisions and boom/bust of the Teton Valley). Now that Kirkwood is in the Vail group, they’ll get their exposure.
In general, I would say that most British Columbia resorts are places the general public are unaware of. Places like Panorama, Kicking Horse, Big White, Fernie, Sun Peaks, Red Mtn, Whitewater are pretty low in skier visits. Revelstoke and Whistler get all the press, but there’s some absolutely killer terrain at those places that are on my to-do list.