I think instead "liking the way a boat looks" and taking boats for "test sails" to find one that sails smoothly enough for your wife, you should do some serious paper research into sailboat characteristics and what makes them sail and handle in a particular way. This will help you narrow down your list.
I hate to say it, but it sounds like your wife is looking for a Westsail or other full-keel, mega-displacement tank of a boat. Something stiff, that slices through the chop, or otherwise ignores it, with an easy motion, and not very tippy.
In otherwords, something slow, and not sexy. Maybe even a catamaran, they're stable, though I don't know how they sail uphill into a chop.
Yeah... Good luck with that.
S/V Old Shoes
1973 Pearson 30 #255