Whiskey vs whisky depends on provenance actually. I know this because I worked in Bushmills, Northern Ireland, one summer (ah, the distilling days!) In Ireland and the US there is an 'e'; if the beverage originates in Canada, Scotland, Wales, etc, though, there is no 'e'.

We love Dalwhinnie here - no idea what the price would be like in the US but it's a very yummy scotch to celebrate with!
Amie Colquhoun
Axiom Audio