I used to have a website up with a review of each book and the reason I included it in the list. I had one by Ellison but none by Dick. I have read THE MAN IN THE HIGH CASTLE and DO ANDROIDS DREAM OF ELECTRIC SHEEP. I was trying to select books not just because the were good stories but because they also contained significant ideas to think about that related to real life, socially, psychologically and the impact of technology.
I divided them into scientific SF and liberal arts SF. The book BRAINWAVE by Poul Anderson was about humanity suddenly becoming more intelligent. I compared that to the internet with the more rapid exchange of ideas and perspectives. The ultimate effect of this interaction is quite unpredictable.