I've managed to avoid using the word World three times on the cover, just once in "World Fantasy Award." It prints well, it looks good and is legible at a distance or when it's reduced in size, none of the background seems to be particularly obtrusive, and it's more interesting than any of the "lots of coins all the same" ideas I previously tried.
In short, I think that this one is the keeper.
Click to enlarge. Click twice for the largest version I've transferred, about 60% of full page size.
The icon is still the early version, I'll replace it eventually.