I have to admit that this thread really amused me (I know, it shouldn't have). As a woman with a HAF problem, though, it did. My husband watched, scowling the first 1.5 years, as I researched the subject. I also subjected him to long discourses on the technology issues/problems. In all, I spent 2 years learning about the topic. He pooh-poohed all of it, but because I was planning on spending separate property money, I told him too bad because I was going to put in a good system. [I'm pretty bossy, need I add and had he done the same thing to me, well who knows what would've happened?]. So, I had an advantage in having saved my own funds to pay for the goodies. The old family room Sony is going into the bedroom, while that 20" TV is going into the computer room.
May I humbly suggest, however, a few ideas that might raise the WAF ratings? I agree with Linda in the post above about the placement/furniture problems. You're gonna have to "wire" around this issue by coming up with something she'll find acceptable. I agree that plasma's are going to be the most acceptable choice once/if the price gets to tolerable levels. I think my decorator is gonna die when he sees the ML Cinemas attached to the rear wall, but tough.
In the meantime, talk up the beauty of HDTV (if it's available or coming to your area) and of DVDs. How much clearer and more detailed the pictures are. Don't take her to see a display UNTIL you've verified that it is properly adjusted. That the details on clothing and decor are stunningly vivid. Tell her that in HDTV, she can see which actresses have had so much botox injected that they can't raise their eyebrows. Sorry if this seems NPC, but I've been fascinated by some of the details I've seen (a plastic surgeon friend tells me he forgets all about the plot as he searches for the tell-tale signs of surgery, both good and bad). Tell the wife how nice it is to see a really good movie at home where you are comfortable with no one seated behind you explaining the entire plot OR making so much noise eating that you can't hear any dialogue.
Also, praise the quality of true 5.1 digital sound which most DVD players and digital HDTV provide. This way you can upgrade your sound system to take advantage of the improvements. While watching Crouching Tiger, Flying Dragon last week, I was actually startled to hear a sword flying and landing BEHIND the sofa (I was sitting at the side). My husband didn't even notice, but then I tell him he's going deaf anyway.
Good luck, guys, on getting approval.