My advice would be to get a new W, but since that won't go over well...here's a common sales technique.
Try and sell her on something that's kind of hideous, more expensive than a Salk, and something you ultimately don't want. Work to convince her, act disappointed when she says no. Then pretend like you're compromising and offer her a better looking and cheaper Salk model. Compromise has been achieved and you got what you wanted.
Or you could order them and just set them up when she's not there. When she comes home you say "I don't know what happened, someone must have broken in and left us these new speakers???"