Great list Shelly. You and Reks are both right that Wild Turkey Rye is good stuff and at 101 proof it is even better. I would add Cointreau or Grand Marnier or Curacao because an orange liqueur is called for in so many cocktails and one of them will do you. Triple Sec is cheaper but the usual brands are too sweet and annoy me. Fitz likes him some Scotch, so don't forget a bottle of something you would be willing to mix with for a nice Rob Roy, a Stone Fence, or Blood and Sand (if you get cherry brandy/liqueur at some point). You can buy small bottles of a lot of these items at decent liquor stores. It is worth the marginally higher per-unit cost if you aren't sure you will use a ton of it (Cointreau, vermouths, absinthe, etc.).
And you will need a tin for shaking unless you already have a form of cocktail shaker. Just buy a cheap tin and combine it with a pint glass and you are all set.
Cheers!