Picked up a bottle of Fee Brothers Cherry bitters today. Very nice and I plan to try it in some stuff.
Tried a little of my current batch of cask manhattans. Two months on oak now and very smooth. Butterscotch and vanilla.
I admit that I am not a huge collector of bitters, I only have 8 or so, and I've had a number that disappointed me (the ridiculously expensive Boker's, Bitter Truth Jerry Thomas, and Fee Bros Aztec Chocolate -- its artificially flavored and tastes a little like Tootsie Rolls-- Fee uses a lot of artificial flavors so I am leery of them), so I am less inclined to get a bunch of bitters. I did, however, pick up a Fee Bros Gin Aged Orange Bitters today and am very impressed with that. I don't have my Angostura Orange with me in my 'new' bar, just Regan's, and it blows Regan's out of the water.
As for mixing glasses and such, I saw a lot of phenomenal glassware when I was in Japan, especially in Yanaki and in Asakusa along the Kappabashi-dori (the street of restaurant supply stores). It seemed like every other glassware store had a huge selection of cocktail ware, and the Yarais were everywhere. I eventually went with a different brand. Don't know why I am relating this other than to say that Japan is a joyful world of cocktail, and I would really encourage everyone to go at some point in their lives.
Just out of curiosity, how much bitters is each batch?