If it's a case of you have a budget and want to get best value out of it, then common sense for me would say go for PP and standard nav. Having said that, if it were me, I'd probably go nav pro because the PP doesn't interest me at all for the way I drive. I would, however, appreciate the larger screen, 3D maps, and additional functions of the nav pro.
As already said, not sure asking anybody will help. You need to decide what's important for you (or your wife) and go from there. Will she really want/need the PP, or is that you wanting it? Being sensible, why not just take standard nav and save some cash?
Getting a bit dull hearing the PP is a no brainer when it can only muster 1 second per mile around the Nurburgring!