Buffalo Trace, Carpano Antica, Martini & Rossi Dry White, Angostura Orange Bitters. A lovely change from the standard Manhattan. For those who think it too sweet, perhaps swap a Tequila Reposado for the Bourbon.
Punt e Mes and Noilly Prat dry proved too bitter for me, but I was all-in on your suggestion to use the former (a long-time favorite). Basic Cinzano Rosso (and Ango orange) seemed to work best, according to my notes.
We second the recent Hinojos verdict. This ratio works better than the standard 1:1 ratio of sweet:dry vermouth in a "perfect." I used Cocchi vermouths di Torino and cask-strength Stranahan's Rocky Mountain Single-Malt whiskey, which lists a very respectable if implausibly precise 109.87 proof on the label. This meant extra stirring with ice for dilution and serving over jumbo ice cubes in DOF glasses. Dropped the expressed orange twists into the glasses. A winner.