Dozois has a knack for picking great stories. The saddest part is that it's tricky to get past editions; when I find an old edition I don't have at a used book store it's terribly exciting, especially since the quality has been so consistent over the years.

I've had pretty good success picking them up in digital formats - not sure if you prefer the paperback version, but if you're okay reading it on a screen you can get all of them digital.