Since several were nice enough to offer opinions I'll update... I've decided I can't make the decision on my wife's watch on my own, it's just too personal a decision and not really fair to her for me to decide. So, even though it could mean major pushback from her, I'll take the risk and I'll take her out one afternoon soon and just tell her she has no choice but to pick something Never thought I would spend retail for something like this, but this will have to be an exception.
To my mild surprise my wife prefers the 31mm Datejust w/ jubilee bracelet and fluted bezel. We tried on some things this weekend and she loved that version. She's taking a few days to think it over before we pull the trigger. And, I didn't even have to convince her that I needed a Sub for myself... good times. I'll post a pic once acquired!