Used Canton (because that's what I had) and Bulleit Rye (because I'm, well, me and will almost always go rye over bourbon). Very tasty cocktail, and perfect for, well, a night like tonight.
Eastern Exposure is a pleasant drink, but as commented on by two others, it has a sweetness to it, from the Ramazzotti I suspect (and from the orange bitters, to a lesser degree), that some may not like. I used Jim Beam Black (a more pronounced taste than Four Roses, yet easy to imbibe), and still the sweetness. As is, I rate this cocktail at 3.5.
Nevertheless, I'm going to make this drink twice more, each a different way. First, I'll make Eastern Exposure using Four Roses' small batch bourbon, and also using lemon bitters instead of orange bitters. Second, I'll make Eastern Exposure using a good rye (Bulleit or Wild Turkey, for example) with orange bitters. I love a good rye drink, and it just may be that Eastern Exposure is a better drink when made with rye. Comparing the drink when made with different bitters vs. made with rye will--hopefully-- give some insight as to how to best make Eastern Exposure.