I would include (or replace) the Asimov with "The Gods Themselves", one of the few Asimov books that I think is *good*. But I vastly preferred Clarke to Asimov.

I reread 'The Moon Is A Harsh Mistress' just a few years ago, and with the exception of the size of the computers, I thought it held up well. Not my favorite Heinlein, but probably his best book.