Boy, caman- those pictures make me wish even more that we could get the Wagon here in the US. I traded in my 2001 wagon for the 2012 SE sport hatchback, and the comparison in interior space is no contest.
I think it would spoil your car, but is there a factory rack available for the Wagon?
I used to haul pressure treated lumber, 4x8 sheets of plywood, yard waste, or bikes on the roof of my car... Who needs a pickup. (maybe me, now)