Opinion & Advice wanted buying the wife a car...

If momma ain't happy, there ain't nobody happy is a fair statement here.
Admit it, you want the Challenger for yourself, not her!
She will NOT like it on a D.D. basis.
Buy her something SHE really likes and that SHE picks out herself.
I would suggest you steer her to something new or newer, good gas mileage, and domestic.