The XC40 is supposed to launch as a 2019 model, so you’ll probably be waiting another 15 months before you can even order one (and launch models always wind up with launch model reliability woes). The V90 is extremely svelte, but you have to custom order it or pick it up in Sweden (which might be an awesome trip). For $50k it’s unique, but not affordable.
The US wagon market is crap…we simply don’t buy enough of them to justify more than a few options. BMW does do the 328xi wagon which if you’re looking upmarket from the Subaru is an option, but starts to get pricy once you check any of the boxes.