If I make mine with bourbon, it's usually Maker's. But...I much prefer rye in my Old Fashioneds and Manhattans - most recently have been using Knob Creek 100. Just finished a bottle of Rittenhouse 100 and I like the KC just as much. I keep a squeeze bottle of simple syrup in the bar fridge, so I do about 3 ice cubes, a short splash of simple syrup, 3-4 shakes of bitters (I've experimented with the Woodford cherry and Fee Bros Orange but still prefer Angostura) and I give that a good stirring to mix the syrup and bitters, then I add more ice and my rye. Give that a quick stir just to take the edge off of the rye bite, garnish with a GOOD cherry (not the bright red ones, something like a Woodford or Luxardo) and enjoy. As with most of the good things in life, simple is better.