It's kind of spooky how 80% of all albums you've mentioned so far have been reviewed in my journal and those that haven't it's because they are 'non heavy' as such, but if I were doing a journal about prog rock they'd be included. In fact the only band mentioned so far that I was never really into is Pink Floyd, even though for some reason I have most of their albums
As for ZZ Top I pretty much love everything about that album and it was at this time I think, they were meant to be putting on some of their best ever live shows.