"The Art of Penguin Science Fiction"

Apparently, Penguin publishes (or did once) science fiction too! And apparently, only the best of science fiction.

See their main page, or the "Classic sf from A to Z". Look like useful places to browse to figure out which book to pick up next.

They're heavy on novels, but there are short fiction collections & anthologies too. And even the later look like tastefully done.

Related: "best of" lists.