A long time ago my wife wanted to replace my 70"s speakers with small speakers.
Knowing Sam's had a no questions asked return policy I bought a Bose Acoustimass system.
Took it home, set it up very carefully.... wifey was very happy until I started playing music.
Packed it back up, returned it, and about 8 or 9 years later when the old speakers needed to be replaced I got no grief over the RF-83's, in fact she helped pick them out.
If she really does not like the sub, you might consider getting one that is even bigger, putting a real nice "throw" over it and calling it a table or display stand.
Then its a win win, you get a better sub and she gets to decorate it.
FWIW I am not trying to be funny, but there are ways for everyone to be happy.