I'm with your wife on Third Wave bright espressos. Not my cup of tea, but as someone who enjoys more traditional medium/dark blends, I'm going to offer an alternative to buying expensive imported canned coffee. Why not try some fresh locally roasted traditional espresso blends? I admit these days they are harder to find, since it seems like all the "good" roasters are on the blonde bandwagon, but I've found a couple reasonably local to me, and once you find a blend you like you can just keep going back.
My favorite for a while has been Bohemian #5, but it's only available at Bohemian Bakery which was fine when it was a walkable distance from my house, but since I moved I had to find a new favorite that I could get relatively fresh at a store near my home. My new favorite is Notes from the Underground by No. Six Depot
in Stockbridge, MA.It's available at one of my local markets, and it's just as good if not better than Bohemian #5! Not local to you though, so I offer it up more as proof of concept than as a recommendation.