The Bose thing is a tough one. I'm looking at nine boxes (TT, CD, DAC, blah blah blah) all hooked up (sometimes my wife even notices a new one: busted on that tube buffer X10!), two humungo Dahlquists and a REL subwoofer. I'm from an era where a kneeler to worship the stereo tower would even be appropriate! (just a joke, please take no religious offense anyone)
So, if your wife really likes the sound you could demo some other speakers that don't cross over at 250 Hz and explain why the Bose is bad when she's digging the new sound
Or
Give in to the fact that you've lost this battle. If she's like my wife, she likes the Bose 'cause you almost can't see it. That's why my rig is in my office in the basement!
Good luck!
biz