i have a similar regard for his work as you do. he's really one of the few directors, like godard for example, who had his own cinematic metaphysics.
by the way, for all the criterion fans, criterion has released "ivan's childhood" recently. it's a very good film. i haven't picked it up myself yet, but i definitely will. i got their version of "solaris" recently and there's a short essay about the film by kurosawa. he mostly retells the story of seeing the film for the first time and meeting tarkovsky. the best part was when they got drunk together after screening of "solaris" and ended up signing the main theme from kurosawa's "seven samurai".