Great choice. Wingbar Evo or Edge? Motion XT i also a good choice, a bit boxy design that should go well with the boxy car. I have a Volvo-box (made by the company Calix) that also have a boxy design but is a bit slimmer then the XT. The embossed Volvo logo i almost not visible....
They are super easy to mount and dismount once you done it the first time. A helping hand is always good on a car this height. I actually have an older version wich has a slightly different bar and foot, but what I have seen the newer is even easier (I had leftover racks with the correct foot over from my last car, I just bought new bars).
I mount mine only when I need it, even though the Thule wingbars doesn't sound that much, but they are not noisless and I can't stand that, especially with glass roof. On an ICE they also effects the consumption, have had chance to test that on the EV9, have only driven around the block.
I also only need them 3-4 times during winter season.