I really enjoy this theme of a struggle to communicate or make sense of non-Earth origin life. You mention the Solaris really changed your views of the universe. I highly recommend Diaspora by Greg Egan or Blindsight by Peter Watts if you haven't already read them.
Diaspora fundamentally changed my view of life and the universe.
I second the Diaspora recommendation, but I found Permutation City even more mind-expanding. It's not such a cohesive story as Diaspora, but the sheer amount of big ideas crammed into that little book is amazing.
Diaspora fundamentally changed my view of life and the universe.