By Kirk Miller What constitutes a special occasion? A promotion? A wedding proposal? Tuesday? For bourbon drinkers, the “special occasion” bottle is probably one that’s in a three- or even four-figure price range and might not even be available anymore, outside of whiskey gray markets. So, roughly, this means a bottle that’s unique, pricey and delicious — or at least something that goes beyond “smooth.” Once again, we’re using the popular “You Only Need Five Bottles” template from Reddit (go here to see our initial five bottle picks plus our Everyday Bottle selections). And we’ll again stick p…