Musician vs. audiophile

What kind of wires are you using ,vs the ones at the store ?
that too can have a big effect.how about your source?
is it the same ? These 2  things can  make a huge difference.

Open discussion forums can be so interesting at times as people describe their listening experiences.  Czarivey and uberwaltz couldn't be more different in their assessment of the Wilson speakers. Subjectivity allows such a very broad spectrum of impressions.
Charles 

The Sophias are anything but flat, punchless and colorless.  Even with an average 250w ss amp ( assuming no impedence mismatch) and a BAT tube front end, the Sophias should give you dynamics and color. 
Either amp/ preamp mismatch, poor setup ( Wilson’s should be toed in so you can barely see the inside of each tweeter portion of the cabinet at your listening position) or cables. My $ is on bad positioning which will make the Sophia’s punchless, colorless and sterile.I agree that a Wilson dealer rep should be hired to have a look. They are truly great speakers if set up right.

Exactly Charles.
Indeed one of the members here might listen to the ops rig and not hear "flat" at all!
However deep down the only opinion of how it sounds that counts is the ops( and his good lady of course) so if flat and uninvolved to them then a fix is to be found.

I don't pretend to know what's going on with you, your wife, and your system.....but I'll second MarqMike:  Lots of musicians are apparently deaf to reproduced sound. I deal with musicians all the time and the variety of their reactions to the same recording thru the same system is bewildering.  

BTW, I have a small home studio and the recordings in question are sometimes my own efforts:  Recordings of people who were playing in the same space that playback is offered thru my system.  If there's a guy on guitar and a woman singing on the recording there will frequently be four or more opinions.  (Love my guitar, love her vocal, but hate the mix....or....love the mix, hate her vocal, love my guitar....etc.  Then you have her takes).

There's no rhyme or reason.