It's always easier to find good material after the fact, going back in time and letting others filter it, instead of trying to figure out which of the present day material is not crap.
Hope you like them! And if you are looking for more, consider giving R.A. Lafferty a shot as well. Another very unique, intelligent SF author without a lot of peers who wrote like him.
Either good scifi is getting harder to find or I'm turning into a right snob.