The best hash I've had was the Nepalese Temple Balls, many moons ago:
http://www.420hash.com/templeballhash.html

It used to be available in New York. The picture does not do it justice, but it blows away most, if not all, of the other types.

Kashmiri was (is) also very good.

I should have checked some out when I was in Holland in the 90's! Well there's always another vacation there, someday, I guess.