So youse talking abotu never owning a 2-wheeled motorized vehicle, or you ain't owned nothing? Either way, good choices!
That 150 will have pleanty of power. IMO I'm have an Elite 150 and it has plenty of acceleration even compared to my 700 cc Shadow. Only issue is top speed on interstates. If it was all I had, it'd be alright on the freeway. Stay in the right lane and cruise, watch out for cagers you'll be fine!
The PCX is a great scoot. And the Met is great for getting your wife started. I'm sure y'all will have lots of fun! Enjoy and keep us posted!
BTW, welcome to the forum!