After getting on non commercialized Rush albums such as Hemispheres, 2112, it's good to "upgrade" with Vander Graaf Generator and Camel. They're true kings of progressive rock and all of their albums are very interesting. The Can is probably the top level of prog experience.
rush hemispheres great music
I was lucky enough to come across a mint original copy of hemispheres and wow, what a great recording. Great musicianship and songwriting, amazing drumming. This album has to be one the greatest rock albums of all time. It seems to me that rush is one of those rare bands that even though they were progressive and I do prefer their older music, they never sold out. Great Music!