By Julia Burke, Beer Editor A visually striking beer, this Three Heads Brewing Java Sutra porter impresses immediately with a gorgeous four-finger head, puff-of-train-smoke black color, and lacing so perfect and so beautifully stratified that I had to take its picture for my beer porn collection. (I have needs.) On the nose, light notes of dark-roast coffee, cinnamon and baker's chocolate are on offer without any cloying sweetness or alcohol. It smells like a porter, not a Frappuccino.  In agreement with the nose, the palate is light and lager-bodied; malt steps up to the plate, but again as roasty coffee-chocolateness,…