I'm the same with Country not a fan but I like Bluegrass and the Country Rock of the Eagles, Pure Prairie League, Poco etc. I remember the Lyn Anderson single "Rose Garden" because it was in the Top 10 here in the UK sometime during 1970-71, I just realised I know most of the words. Now I can't get the song out of my head! As you say this DV release opens up fans of the genre to getting some good Quad, so I hope it does well.
there are a fair few Country Quad gems but one of the most fun CBS Country Quads for me is the George Jones & Tammy Wynette album "We Go Together", it is an absolute hoot of a mix!
as for content and quality of CBS Country Quads my absolute favourites are 2 of the 5 Charlie Rich Quads "Behind Closed Doors" and "Every Time You Touch Me I Get High" the former having his biggest most well-known hits of course but both of them feature some absolutely gorgeous tunes.