You might find the Circle Labs A200 interesting. Here's a thread on Audiogon where owners share their opinions.
Why would the wife pick the amp out? I have brought dozens of electronics and speakers through my living room over the past 35+ years in our current home. My wife never, ever once complained, she couldn't care less. When I got the Triton Refs, I kept telling my wife while I waited the 6 months, they were going to be big. When I set them up, not a peep about the size. I would never have to say anything to my wife, she knows it's important to me and that is ok with her. I guess I am one of the lucky ones.
If I were the OP I would talk to my wife and explain that the Pass amp is matched pretty good to his speakers or something. Let her know it's important to him. If he is a "yes dear" kind of guy he hasn't a chance, but if he questions, who knows?